Submission #575744

#	Time	Username	Problem	Language	Result	Execution time	Memory
575744		jack715	Wombats (IOI13_wombats)	C++14	55 / 100	20059 ms	26364 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define pp pop_back
#define mp make_pair
#define bb back
#define ff first
#define ss second

using namespace std;

vector<vector<int> > H, V, travel;
int R, C;

void build() {
    vector<int> presum(C);
    presum[0] = 0;
    for (int i = 0; i < C-1; i++) {
        presum[i+1] = H[0][i] + presum[i];
    }

    for (int i = 0; i < C; i++)
    for (int j = 0; j < C; j++) {
        if (i >= j)
            travel[i][j] = presum[i]-presum[j];
        else 
            travel[i][j] = presum[j]-presum[i];
    }

    for (int r = 1; r < R; r++) {
        presum[0] = 0;
        for (int i = 0; i < C-1; i++) {
            presum[i+1] = H[r][i] + presum[i];
        }

        for (int i = 0; i < C; i++) {
            vector<int> next(C, INT_MAX); 
            next[0] = travel[i][0] + V[r-1][0];
            int now = next[0];
            for (int j = 1; j < C; j++) {
                now = min(now+H[r][j-1], travel[i][j] + V[r-1][j]);
                next[j] = min(next[j], now);
            }
            next[C-1] = min(next[C-1], travel[i][C-1] + V[r-1][C-1]);
            now = next[C-1];
            for (int j = C-2; j >= 0; j--) {
                now = min(now+H[r][j], travel[i][j] + V[r-1][j]);
                next[j] = min(next[j], now);
            }
            travel[i] = next;
        }
    }
}

void init(int r, int c, int h[5000][200], int v[5000][200]) {
    R = r, C = c;
    H.resize(R, vector<int>(C));
    V.resize(R, vector<int>(C));
    travel.resize(C, vector<int>(C));
    
    for (int i = 0; i < R; i++)
    for (int j = 0; j < C-1; j++)
        H[i][j] = h[i][j];
    for (int i = 0; i < R-1; i++)
    for (int j = 0; j < C; j++)
        V[i][j] = v[i][j];
    
    build();
}

void changeH(int P, int Q, int W) {
    H[P][Q] = W;
    build();
}

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

int escape(int V1, int V2) {
    return travel[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: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24