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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
#214461#2718. 8.2t3KXGCompile Error//C++113.4kb2024-11-18 22:33:482024-11-19 08:38:53

answer

#include <cstdio>
#include <algorithm>
using namespace std;
const int mod = 998244353;
struct matrix {
    int n = 0, m = 0;
    int a[5][5] = {};
    void print() {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= m; j++) {
                printf("%d ", a[i][j]);
            }
            printf("\n");
        }
        printf("\n");
    }
};
matrix mul(matrix a, matrix b) {
    matrix res;
    res.n = a.n;
    res.m = b.m;
    for (int i = 1; i <= a.n; i++) {
        for (int j = 1; j <= a.m; j++) {
            for (int k = 1; k <= b.m; k++) {
                res.a[i][k] = (res.a[i][k] + 1ll * a.a[i][j] * b.a[j][k] % mod) % mod;
            }
        }
    }
    return res;
}
matrix unit(int n) {
    matrix res;
    res.n = res.m = n;
    for (int i = 1; i <= n; i++) {
        res.a[i][i] = 1;
    }
    return res;
}
matrix pow(matrix a, long long p) {
    matrix res = unit(a.n);
    for (; p; p >>= 1, a = mul(a, a)) {
        if (p & 1) {
            res = mul(res, a);
        }
    }
    return res;
}
struct segmenttree {
    matrix a[400010];
    matrix nodes[2000010];
    void pushup(int p) {
        nodes[p] = mul(nodes[p << 1], nodes[p << 1 | 1]);
    }
    void build(int p, int l, int r) {
        if (l == r) {
            nodes[p] = a[l];
            return;
        }
        int mid = (l + r) >> 1;
        build(p << 1, l, mid);
        build(p << 1 | 1, mid + 1, r);
        pushup(p);
    }
    void modify(int p, int l, int r, int k, matrix x) {
        if (l == r) {
            nodes[p] = x;
            return;
        }
        int mid = (l + r) >> 1;
        if (k <= mid) {
            modify(p << 1, l, mid, k, x);
        } else {
            modify(p << 1 | 1, mid + 1, r, k, x);
        }
        pushup(p);
    }
} sgt;
matrix base;
int n, m, q, x[100010], y[100010], t[100010];
bool is[200010][5];
matrix make(int k) {
    matrix res;
    res.n = res.m = n;
    for (int i = 1; i <= n; i++) {
        for (int j = i; j <= n; j++) {
            if (is[k][j]) break;
            if (i - j == 1 || j - i == 1) {
                res.a[i][j] = res.a[j][i] = 1;
            }
        }
    }
    return res;
}
int main() {
    scanf("%d%d%d", &n, &m, &q);
    base = make(0);
    for (int i = 1; i <= q; i++) {
        scanf("%d%d", &x[i], &y[i]);
        t[i] = y[i];
    }
    sort(t + 1, t + q + 1);
    int uq = unique(t + 1, t + q + 1) - t - 1;
    for (int i = 1; i <= uq; i++) {
        sgt.a[2 * i - 1] = pow(base, t[i] - t[i - 1] - 1);
        sgt.a[2 * i] = base;
    }
    sgt.a[2 * uq + 1] = pow(base, m - t[uq]);
    int sgtn = 2 * uq + 1;
    // for (int i = 1; i <= sgtn; i++) {
    //     sgt.a[i].print();
    // }
    sgt.build(1, 1, sgtn);
    // sgt.nodes[1].print();
    for (int i = 1; i <= q; i++) {
        int k = lower_bound(t + 1, t + uq + 1, y[i]) - t;
        is[k][x[i]] = true;
        sgt.a[2 * k] = make(k);
        // printf("===== %d =====\n", i);
        // for (int j = 1; j <= sgtn; j++) {
        //     sgt.a[j].print();
        // }
        // printf("===== %d =====\n", i);
        // printf("then the ans is :\n");
        sgt.modify(1, 1, sgtn, 2 * k, make(k));
        // sgt.nodes[1].print();
        // printf("===== %d =====\n\n\n\n", i);
        printf("%d\n", sgt.nodes[1].a[1][n]);
    }
    return 0;
}

详细

Compiler Memory Limit Exceeded