Submission #1369798

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Source Code Expand

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

int A, B, n, ad[2010];
char ans[2010];

int main(){
	scanf("%d%d", &A, &B);
	if(A <= B){ puts("Impossible"); return 0; }
	n = A + B;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < 2; j++){
			printf("? %d %d\n", (i + j) % n, (i + !j) % n);
			fflush(stdout);
			char buf[3];
			scanf("%s", buf);
			ad[i] += ((buf[0] == 'Y') << (!j));
		}
		if(ad[i] == 1) ans[(i + 1) % n] = '0';
		else if(ad[i] == 2) ans[i] = '0';
	}
	for(int i = 0; i <= n; i++){
		if(ans[i % n] && ad[i % n] == 3) ans[(i + 1) % n] = ans[i % n];
	}
	for(int i = n; i >= 0; i--){
		if(ans[(i + 1) % n] && ad[i % n] == 3) ans[i % n] = ans[(i + 1) % n];
	}
	for(int i = 0; i < n; i++) if(!ans[i]) ans[i] = '1';
	printf("! %s", ans);
	fflush(stdout);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &A, &B);
                       ^
./Main.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%s", buf);
                    ^

Judge Result