Submission #1138080

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Source Code Expand

#include<iostream>
#include<algorithm>
#include<vector>
#include<cstdio>
#include<string>
#include<unordered_set>
#include<map>
using namespace std;
 
int a[30][30];
int dx[4] = { -1,0,0,1 }, dy[4] = { 0,-1,1,0 };

void DFS(int x, int y) {
	printf("%d %d\n", x+1, y+1);
	a[x][y]--;
	for (int i = 0; i < 4; i++) {
		int n = x + dx[i], m = y + dy[i];
		if (n >= 0 && n < 30 && m >= 0 && m < 30 && a[n][m]!=0 && a[n][m] == a[x][y]) {
			DFS(n, m);
			break;
		}
	}
}
signed main(){
	for (int b = 0; b < 30; b++) {
		for (int c = 0; c < 30; c++) {
			scanf("%d", &a[b][c]);
		}
	}
	for (int b =0;b<30;b++) {
		for (int c = 29;c>=0;c--) {
			while (a[b][c]) {
				DFS(b, c);
			}
		}
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:27:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &a[b][c]);
                         ^

Judge Result