提出 #65420114

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ソースコード 拡げる

#include <bits/stdc++.h>
#define ll long long
#define rep(i, x, y) for (int i = (x); i <= (y); ++i)
#define drep(i, x, y) for (int i = (x); i >= (y); --i)
#define pb push_back
#define pii pair<int, int>
#define fi first
#define se second
#define mem(a, b) memset((a), b, sizeof(a))
#define ALL(a) (a).begin(), (a).end()
#define fastio ios::sync_with_stdio(0), cin.tie(0), cout.tie(0)
using namespace std;
template <typename T> inline void cmin(T &x, T y) { if(x > y) x = y; }
template <typename T> inline void cmax(T &x, T y) { if(x < y) x = y; }
void Fin(string s) { freopen((s + ".in").c_str(), "r", stdin); }
void Fout(string s) { freopen((s + ".out").c_str(), "w", stdout); }

int main() {
	string s;
	cin >> s;
	map<char, int> mp;
	for(char c : s) mp[c] = 1;
	rep(i, 'a', 'z') if(!mp[i]) cout << (char)i << '\n', exit(0);
	
	return 0;
}

提出情報

コンパイルエラー

Main.cpp: In function ‘void Fin(std::string)’:
Main.cpp:15:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   15 | void Fin(string s) { freopen((s + ".in").c_str(), "r", stdin); }
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function ‘void Fout(std::string)’:
Main.cpp:16:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   16 | void Fout(string s) { freopen((s + ".out").c_str(), "w", stdout); }
      |                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ジャッジ結果