Submission #1074038

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074038		Ignut	Wombats (IOI13_wombats)	C++17	55 / 100	20066 ms	33392 KiB

wombats

// Ignut

#include <bits/stdc++.h>
#include "wombats.h"

using namespace std;
using ll = long long;

// const int H = 5555, W = 222;
int h, w;

vector<vector<int>> dwn, rht;
vector<vector<int>> pref;

void init(int R, int C, int H[5000][200], int V[5000][200]) {
    h = R, w = C;
    dwn.assign(h, {});
    rht.assign(h, {});
    pref.assign(h, {});

    for (int i = 0; i < h - 1; i ++)
        for (int j = 0; j < w; j ++)
            dwn[i].push_back(V[i][j]);
    
    for (int i = 0; i < h; i ++) {
        pref[i].push_back(0);
        for (int j = 0; j < w - 1; j ++) {
            rht[i].push_back(H[i][j]);
            pref[i].push_back(pref[i].back() + H[i][j]);
        }
    }
}

void changeH(int P, int Q, int W) {
    rht[P][Q] = W;
    pref[P] = {0};
    for (int j = 0; j < w - 1; j ++)
        pref[P].push_back(pref[P].back() + rht[P][j]);
}

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

const int INF = 1e9 + 123;

int escape(int V1, int V2) {
    vector<int> dist(w, INF);
    dist[V1] = 0;
    for (int i = 0; i < h; i ++) {
        for (int j1 = 0; j1 < w; j1 ++) {
            for (int j2 = 0; j2 < w; j2 ++) {
                dist[j1] = min(dist[j1], dist[j2] + abs(pref[i][j1] - pref[i][j2]));
            }
        }
        if (i + 1 < h)
            for (int j = 0; j < w; j ++)
                dist[j] += dwn[i][j];
    }
    return dist[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: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24