Submission #1068046

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068046		thinknoexit	Wombats (IOI13_wombats)	C++17	28 / 100	2876 ms	137296 KiB

wombats

#include "wombats.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 5050;
const int M = 101;
int rc[N][M]; // cost from (i, j) -> (i+1, j)
int cc[N][M]; // cost from (i, j) -> (i, j+1)
int n, m;
struct A {
    int dis[M][M], r;
    A operator + (const A& o) const {
        A res;
        for (int i = 0;i < m;i++) {
            for (int j = 0;j < m;j++) {
                res.dis[i][j] = 1e9;
                for (int k = 0;k < m;k++) {
                    res.dis[i][j] = min(res.dis[i][j],
                        dis[i][k] + rc[r][k] + o.dis[k][j]);
                }
            }
        }
        res.r = o.r;
        return res;
    }
} tree[2 * N];
void build(int now = 1, int l = 0, int r = n - 1) {
    if (l == r) {
        vector<int> sum(m);
        sum[0] = 0;
        for (int i = 1;i < m;i++) {
            sum[i] = sum[i - 1] + cc[l][i - 1];
        }
        for (int i = 0;i < m;i++) {
            for (int j = i;j < m;j++) {
                tree[now].dis[i][j] = tree[now].dis[j][i] = sum[j] - sum[i];
            }
        }
        tree[now].r = r;
        return;
    }
    int mid = (l + r) / 2;
    build(2 * now, l, mid), build(2 * now + 1, mid + 1, r);
    tree[now] = tree[2 * now] + tree[2 * now + 1];
};
void update(int v, int now = 1, int l = 0, int r = n - 1) {
    if (l == r) {
        vector<int> sum(m);
        sum[0] = 0;
        for (int i = 1;i < m;i++) {
            sum[i] = sum[i - 1] + cc[l][i - 1];
        }
        for (int i = 0;i < m;i++) {
            for (int j = i;j < m;j++) {
                tree[now].dis[i][j] = tree[now].dis[j][i] = sum[j] - sum[i];
            }
        }
        tree[now].r = r;
        return;
    }
    int mid = (l + r) / 2;
    if (v <= mid) update(v, 2 * now, l, mid);
    else update(v, 2 * now + 1, mid + 1, r);
    tree[now] = tree[2 * now] + tree[2 * now + 1];
}
void init(int R, int C, int H[5000][200], int V[5000][200]) {
    n = R, m = C;
    for (int i = 0;i < n - 1;i++) {
        for (int j = 0;j < m;j++) {
            rc[i][j] = V[i][j];
        }
    }
    for (int i = 0;i < n;i++) {
        for (int j = 0;j < m - 1;j++) {
            cc[i][j] = H[i][j];
        }
    }
    build();
}

void changeH(int P, int Q, int W) {
    cc[P][Q] = W;
    update(P);
}

void changeV(int P, int Q, int W) {
    rc[P][Q] = W;
    update(P);
}

int escape(int V1, int V2) {
    return tree[1].dis[V1][V2];
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

• Subtask 1: 0 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24