Submission #263252

#	Time	Username	Problem	Language	Result	Execution time	Memory
263252		eohomegrownapps	Wombats (IOI13_wombats)	C++14	55 / 100	20066 ms	18040 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
using namespace std;

int (*h)[200];
int (*v)[200];

int r,c; //r: height c: width
int INF = 1e9;
void init(int R, int C, int H[5000][200], int V[5000][200]) {
    /* ... */
    h=H;v=V;
    r=R;c=C;
}

void changeH(int P, int Q, int W) {
    /* ... */
    h[P][Q]=W;
}

void changeV(int P, int Q, int W) {
    /* ... */
    v[P][Q]=W;
}

int harr[2][5000];
int prefsum[5000];

int escape(int vtop, int vbot) {
    for (int i = 0; i<c; i++){
    	harr[0][i]=INF;
    }
    harr[0][vtop]=0;
    bool cur = 1;
    for (int y = 1; y<=r; y++){
    	//process row h[y-1][x] and v[y-1][x]
    	prefsum[0]=0;
    	for (int x = 0; x<c-1; x++){
    		prefsum[x+1]=prefsum[x]+h[y-1][x];
    	}
    	int minval = INF;
    	for (int x = c-1; x>=0; x--){
    		int vert = (y==r)?0:v[y-1][x];
    		//cout<<prefsum[x]<<' ';
    		minval=min(minval,prefsum[x]+harr[!cur][x]);
    		harr[cur][x]=minval-prefsum[x]+vert;
    	}//cout<<'\n';
    	
    	prefsum[c-1]=0;
    	for (int x = c-2; x>=0; x--){
    		prefsum[x]=prefsum[x+1]+h[y-1][x];
    	}
    	minval = INF;
    	for (int x = 0; x<c; x++){
    		int vert = (y==r)?0:v[y-1][x];
    		minval=min(minval,prefsum[x]+harr[!cur][x]);
    		harr[cur][x]=min(harr[cur][x],minval-prefsum[x]+vert);
    	}
    	/*for (int i = 0; i<c; i++){
    		cout<<harr[cur][i]<<' ';
    	}cout<<'\n';*/
    	cur=!cur;
    }
    return harr[!cur][vbot];
}

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