ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#214594 | #2681. How Many Paths? | N | 100 | 1748ms | 20356kb | C++11 | 3.1kb | 2024-11-20 19:36:37 | 2024-11-20 23:03:09 |
answer
//
// na 2681.cpp
// Competitive Programming
//
// Created by m2 on 2024/11/20.
//
#include <stdio.h>
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <vector>
using namespace std;
#ifdef MAC_OS_VERSION_11_0
const int maxn = 105;
#else
const int maxn = 1e5 + 5;
#endif
const int maxm = 5e5 + 5;
int n, m, u[maxm], v[maxm];
inline void qread(int &var){
var = 0;
char reg = getchar();
while(reg - 48 > 9u)
reg = getchar();
do{
var = (var << 1) + (var << 3) + (reg ^ 48);
reg = getchar();
}while(reg - 48 < 10u);
}
vector<int> to[maxn], t2[maxn];
int st[maxn], stl, dfn[maxn], low[maxn], scc[maxn], sccsiz[maxn], sccn, cl;
bool inst[maxn];
void tarjan(int idx){
inst[idx] = true;
dfn[idx] = low[idx] = ++cl;
st[++stl] = idx;
for(int nxt: to[idx]){
if(!dfn[nxt]){
tarjan(nxt);
low[idx] = min(low[idx], low[nxt]);
}else{
if(inst[nxt])
low[idx] = min(low[idx], dfn[nxt]);
}
}
if(dfn[idx] == low[idx]){
++sccn;
do{
inst[st[stl]] = false;
scc[st[stl--]] = sccn;
++sccsiz[sccn];
}while(st[stl + 1] != idx);
}
}
bool mult[maxn];
void fill(int idx){
if(mult[idx])
return;
mult[idx] = true;
for(int nxt: t2[idx])
fill(nxt);
}
int sol[maxn], que[maxn], qs, qe, deg[maxn];
inline void topo(){
for(int i = 1; i <= n; ++i)
for(int j: t2[i])
++deg[j];
que[qe++] = scc[1];
sol[scc[1]] = 1;
int cur;
while(qs < qe){
cur = que[qs++];
for(int nxt: t2[cur]){
sol[nxt] = min(2, sol[nxt] + sol[cur]);
if(!--deg[nxt])
que[qe++] = nxt;
}
}
}
int main(){
cin.tie(0)->sync_with_stdio(false);
qread(n); qread(m);
for(int i = 0; i < m; ++i){
qread(u[i]); qread(v[i]);
to[u[i]].push_back(v[i]);
}
tarjan(1);
// cerr << "scc: ";
// for(int i = 1; i <= n; ++i)
// cerr << scc[i] << ' ';
// cerr << endl;
for(int i = 0; i < m; ++i)
if(dfn[u[i]] && dfn[v[i]] && scc[u[i]] != scc[v[i]]){
t2[scc[u[i]]].push_back(scc[v[i]]);
// cerr << scc[u[i]] << " -> " << scc[v[i]] << endl;
}
for(int i = 1; i <= n; ++i)
if(sccsiz[scc[i]] > 1)
fill(scc[i]);
// cerr << "mult: ";
// for(int i = 1; i <= n; ++i)
// cerr << boolalpha << mult[scc[i]] << noboolalpha << " ";
// cerr << endl;
topo();
// cerr << "sol: ";
// for(int i = 1; i <= n; ++i)
// cerr << sol[scc[i]] << ' ';
// cerr << endl;
for(int i = 1; i <= n; ++i){
if(!dfn[i]){
// cout << 0 << ' ';
putchar(48);
}else if(mult[scc[i]]){
// cout << 3 << ' ';
putchar(51);
}else{
// cout << sol[scc[i]] << ' ';
putchar(sol[scc[i]] ^ 48);
}
putchar(' ');
}
putchar('\n');
fflush(stdout);
return 0;
}
详细
小提示:点击横条可展开更详细的信息
Test #1:
score: 5
Accepted
time: 94ms
memory: 15700kb
input:
50000 500000 27433 23782 1927 1159 20346 8794 27393 18828 40557 32372 29462 34217 31695 6752 2253 19...
output:
1 2 0 2 0 0 2 0 2 2 0 2 0 2 2 0 0 2 2 0 2 2 0 2 2 0 1 2 2 2 0 2 0 0 2 2 0 2 0 0 2 2 2 1 0 2 0 0 2 0 ...
result:
ok single line: '1 2 0 2 0 0 2 0 2 2 0 2 0 2 2 ... 0 1 1 2 2 0 2 0 2 2 0 0 0 0 2 '
Test #2:
score: 5
Accepted
time: 87ms
memory: 14124kb
input:
50000 500000 30894 37863 18739 43205 26461 20214 15741 957 38985 43365 15978 10327 7414 35300 17146 ...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #3:
score: 5
Accepted
time: 105ms
memory: 14956kb
input:
50000 500000 38020 5057 495 7556 33072 22521 28583 41495 7199 42249 37197 26482 34166 16408 33429 19...
output:
1 0 2 0 0 2 0 0 0 2 2 2 2 0 0 0 0 2 2 2 0 2 2 0 0 2 0 0 0 0 0 0 0 0 2 0 0 0 0 2 0 0 0 2 0 2 2 0 1 0 ...
result:
ok single line: '1 0 2 0 0 2 0 0 0 2 2 2 2 0 0 ... 0 0 2 1 0 0 0 0 0 0 2 0 2 1 0 '
Test #4:
score: 5
Accepted
time: 109ms
memory: 15936kb
input:
50000 500000 9177 925 34439 28325 7099 9560 21204 48849 36028 23762 6297 46964 38036 31855 6292 1832...
output:
1 2 2 2 0 2 0 2 2 0 1 0 2 2 2 0 2 0 2 0 0 2 2 2 0 2 0 0 2 2 0 2 2 0 0 2 0 0 2 2 2 0 0 0 2 0 2 0 2 2 ...
result:
ok single line: '1 2 2 2 0 2 0 2 2 0 1 0 2 2 2 ... 1 0 0 0 2 0 0 1 0 2 2 0 2 2 0 '
Test #5:
score: 5
Accepted
time: 79ms
memory: 14632kb
input:
50000 500000 30632 1595 20715 35227 44119 45259 47444 36877 6942 14652 2864 18557 42367 19431 38615 ...
output:
1 2 0 0 0 0 0 2 0 0 0 0 0 0 2 2 2 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 2 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 2 0 0 0 0 0 2 0 0 0 0 0 0 2 ... 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #6:
score: 5
Accepted
time: 79ms
memory: 14540kb
input:
50000 500000 33040 23079 35743 21197 49128 38373 36656 46198 17910 29433 45170 24921 28618 34080 100...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 2 2 0 0 0 0 0 0 0 0 0 2 0 0 0 1 0 0 0 0 0 0 2 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #7:
score: 5
Accepted
time: 74ms
memory: 14412kb
input:
50000 500000 5226 27470 49597 10290 40326 34407 17000 37084 26244 45989 48273 4706 15981 19231 26219...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #8:
score: 5
Accepted
time: 93ms
memory: 15004kb
input:
50000 500000 16952 41617 2923 24354 4446 41320 8355 41065 23930 48553 5990 23289 30279 14635 16174 1...
output:
1 0 2 2 2 2 0 0 0 2 1 0 0 2 0 0 0 0 0 2 2 0 2 0 1 0 0 2 0 1 2 0 2 0 2 0 2 2 0 0 0 2 2 2 2 0 0 0 2 2 ...
result:
ok single line: '1 0 2 2 2 2 0 0 0 2 1 0 0 2 0 ... 0 0 2 2 2 0 0 1 2 1 0 2 0 2 0 '
Test #9:
score: 5
Accepted
time: 104ms
memory: 16184kb
input:
50000 500000 40140 17583 24758 1389 12331 1829 43385 23986 38136 28093 21088 33706 44519 38558 39908...
output:
1 2 0 2 2 0 0 2 0 1 2 2 2 2 2 2 0 2 0 2 2 0 2 0 2 2 0 0 2 0 2 2 0 0 2 2 0 2 2 2 2 2 2 2 2 2 2 0 0 2 ...
result:
ok single line: '1 2 0 2 2 0 0 2 0 1 2 2 2 2 2 ... 2 2 1 0 0 0 2 0 0 2 0 0 2 0 2 '
Test #10:
score: 5
Accepted
time: 81ms
memory: 14236kb
input:
50000 500000 26128 23615 14751 3541 9682 26585 39984 12641 32407 34611 40404 13491 49939 11363 19404...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #11:
score: 5
Accepted
time: 78ms
memory: 20304kb
input:
100000 500000 1 2 1 3 1 8 1 10 1 11 1 17 1 48 1 100 1 284 1 3021 1 7857 1 16097 1 18352 1 17333 1 81...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 2 1 1 1 1 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #12:
score: 5
Accepted
time: 86ms
memory: 20296kb
input:
100000 500000 1 2 1 4 1 5 1 7 1 8 1 13 1 15 1 587 1 6125 1 8728 1 1965 1 12132 1 8992 1 17819 1 1358...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 0 0 3 3 '
Test #13:
score: 5
Accepted
time: 91ms
memory: 20292kb
input:
100000 500000 1 2 1 6 1 45 1 68 1 79 1 496 1 546 1 1119 1 1510 1 1665 1 3262 1 4727 1 4879 1 5430 1 ...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #14:
score: 5
Accepted
time: 94ms
memory: 20356kb
input:
100000 500000 1 2 1 4 1 8 1 16 1 28 1 58 1 85 1 96 1 106 1 241 1 3315 1 3551 1 13 1 1969 1 12587 1 1...
output:
1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #15:
score: 5
Accepted
time: 80ms
memory: 20308kb
input:
100000 500000 1 2 1 7 1 13 1 15 1 18 1 74 1 277 1 652 1 1116 1 8926 1 9947 1 12793 1 17696 1 1742 1 ...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #16:
score: 5
Accepted
time: 75ms
memory: 20276kb
input:
100000 500000 1 2 1 4 1 5 1 7 1 8 1 21 1 26 1 29 1 31 1 254 1 385 1 451 1 678 1 1278 1 2323 1 3775 1...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #17:
score: 5
Accepted
time: 95ms
memory: 20300kb
input:
100000 500000 1 2 1 15 1 44 1 60 1 183 1 365 1 582 1 1768 1 1793 1 6193 1 9585 1 12293 1 447 1 9529 ...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #18:
score: 5
Accepted
time: 72ms
memory: 20308kb
input:
100000 500000 1 2 1 3 1 4 1 65 1 103 1 282 1 3710 1 5403 1 7559 1 4446 1 5382 1 5028 1 18244 1 5690 ...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 1 1 2 1 1 1 2 1 1 1 1 1 2 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #19:
score: 5
Accepted
time: 81ms
memory: 20292kb
input:
100000 500000 1 2 1 6 1 310 1 510 1 643 1 667 1 4289 1 13736 1 15465 1 7212 1 8416 1 8424 1 11633 1 ...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 2 2 2 1 1 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '
Test #20:
score: 5
Accepted
time: 91ms
memory: 20288kb
input:
100000 500000 1 2 1 4 1 6 1 7 1 10 1 16 1 247 1 433 1 540 1 2050 1 2671 1 13116 1 9660 1 18620 1 107...
output:
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 ...
result:
ok single line: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 '