Submission #59672

#	Time	Username	Problem	Language	Result	Execution time	Memory
59672		spencercompton	Wombats (IOI13_wombats)	C++17	37 / 100	20031 ms	18760 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
using namespace std;
int bel[5000][200];
int rig[5000][200];
int r, c;
bool v[5000][200];
int pre[5000][200];
bool upd = false;;
int sum = 0;
void init(int R, int C, int H[5000][200], int V[5000][200]) {
	r = R;
	c = C;
	for(int i = 0; i<r; i++){
		for(int j =0 ; j<c; j++){
			if(i+1<r){
				bel[i][j] = V[i][j];
				sum += V[i][j];
			}
			if(j+1<c){
				rig[i][j] = H[i][j];
			}
		}
	}
	for(int i = 0; i<c; i++){
		for(int j = 0; j<c; j++){
			pre[i][j] = -1;
		}
	}
}
 
void changeH(int P, int Q, int W) {
	rig[P][Q] = W;
	upd = true;
}
 
void changeV(int P, int Q, int W) {
	sum += (W-bel[P][Q]);
	bel[P][Q] = W;
	upd = true;
}
 
int escape(int V1, int V2) {
	if(c==1){
		return sum;
	}
	if(!upd && c<=20 && pre[V1][V2]!=-1){
		return pre[V1][V2];
	}
	int maxans = r + c;
	maxans *= 1000;
	vector<pair<int, int> > li[2000];
	li[0].push_back(make_pair(0,V1));
	for(int i = 0; i<r; i++){
		for(int j = 0; j<c; j++){
			v[i][j] = false;
		}
	}
	int mo[4000];
	for(int i = 0; i<4000; i++){
		mo[i] = i%2000;
	}
	for(int zz = 0;; zz++){
		int z = zz%2000;
		for(int i =0; i<li[z].size(); i++){
			int y = li[z][i].first;
			int x = li[z][i].second;
			if(y==r-1 && x==V2){
				pre[V1][V2] = zz;
				return zz;
			}
			if(v[y][x]){
				continue;
			}
			v[y][x] = true;
			int ny, nx;
			if(x>0){
				 ny = y;
				 nx = x-1; 
				if(!v[ny][nx]){
					li[mo[z+rig[ny][nx]]].push_back(make_pair(ny,nx));
				}
			}
			if(x<c-1){
				 ny = y;
				 nx = x+1;
				if(!v[ny][nx]){
					li[mo[z+rig[y][x]]].push_back(make_pair(ny,nx));
				}
			}
			if(y<r-1){
				 ny = y+1;
				 nx = x;
				if(!v[ny][nx]){
					li[mo[z+bel[y][x]]].push_back(make_pair(ny,nx));
				}
			}
		}
		li[z].clear();
	}
    return -1;
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
  int res;
      ^~~
wombats.cpp: In function 'int escape(int, int)':
wombats.cpp:65:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i =0; i<li[z].size(); i++){
                 ~^~~~~~~~~~~~~

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