提出 #26109880

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ソースコード 拡げる

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
typedef long long ll;
template <typename T> T Max(T x, T y) { return x > y ? x : y; }
template <typename T> T Min(T x, T y) { return x < y ? x : y; }
template <typename T>
T &read(T &r) {
	r = 0; bool w = 0; char ch = getchar();
	while(ch < '0' || ch > '9') w = ch == '-' ? 1 : 0, ch = getchar();
	while(ch >= '0' && ch <= '9') r = r * 10 + (ch ^ 48), ch = getchar();
	return r = w ? -r : r;
}
const int N = 1000100;
int n, ct;
char ch[N], s[N];
signed main() {
	read(n);
	scanf("%s", ch+1);
	int len = strlen(ch+1);
	for(int i = 1; i <= n; ++i) ct += ch[i] == '1';
	putchar('1');
	for(int o = len; o; --o)
		if(ch[o] == '0') ch[o] = '1', ++ct;
		else {
			ch[o] = '0';
			--ct;
			break ;
		}
	std::reverse(ch + 1, ch + len + 1);
	for(int i = len+1; i <= n; ++i) ch[i] = '0';
	std::reverse(ch + 1, ch + n + 1);
	for(int i = 1; i <= n; ++i) {
		if(!ct) break ;
		if(ch[i] == '0') {
			s[i] = '0';
			for(int o = n; o; --o)
				if(ch[o] == '0') ch[o] = '1', ++ct;
				else {
					ch[o] = '0';
					--ct;
					break ;
				}
		}
		else s[i] = '1', ch[i] = '0', --ct;
	}
	printf("%s\n", s+1);
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   20 |  scanf("%s", ch+1);
      |  ~~~~~^~~~~~~~~~~~

ジャッジ結果