제출 #313913

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
313913		phathnv	Elder (COCI19_elder)	C++11	50 / 50	1 ms	368 KiB

elder

#include <bits/stdc++.h>

#define mp make_pair
#define X first
#define Y second
#define taskname "ELDER"

using namespace std;

typedef long long ll;
typedef pair <int, int> ii;

char s;
int n;
bool d[26];

void readInput(){
    cin >> s >> n;
}

void solve(){
    int cnt = 1;
    int cur = s - 'A';
    d[cur] = 1;
    for(int i = 1; i <= n; i++){
        char a, b;
        cin >> a >> b;
        a -= 'A';
        b -= 'A';
        if (b != cur)
            continue;
        cur = a;
        if (!d[cur])
            cnt++;
        d[cur] = 1;
    }
    cout << (char) (cur + 'A') << '\n' << cnt;
}

int main(){
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }
    readInput();
    solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

elder.cpp: In function 'int main()':
elder.cpp:42:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   42 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
elder.cpp:43:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   43 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 50 / 50