제출 #653138

#제출 시각아이디문제언어결과실행 시간메모리
653138aryan12세 명의 친구들 (BOI14_friends)C++17
100 / 100
47 ms6128 KiB
#include <bits/stdc++.h> using namespace std; string s,t; int l,r,i,p,n,f,g; bool check() { p = 0; for(i = l; i <= r; i++) { if(p != t.size() && t[p] == s[i]) { p++; } } return (p == t.size()); } int32_t main() { cin >> n; cin >> s; if(n % 2 == 0) { cout << "NOT POSSIBLE\n"; return 0; } t = s.substr(0, n / 2); l = n / 2; r = n - 1; f = check(); t = s.substr(n - n / 2, n / 2); l = 0; r = n / 2; g = check(); if(!f && !g) { cout << "NOT POSSIBLE\n"; } else if(f && g && s.substr(0, n / 2) != s.substr(n - n / 2, n / 2)) { cout << "NOT UNIQUE\n"; } else if(f) { cout << s.substr(0, n / 2) << "\n"; } else { cout << s.substr(n - n / 2, n / 2) << "\n"; } }

컴파일 시 표준 에러 (stderr) 메시지

friends.cpp: In function 'bool check()':
friends.cpp:9:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |         if(p != t.size() && t[p] == s[i]) {
      |            ~~^~~~~~~~~~~
friends.cpp:13:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     return (p == t.size());
      |             ~~^~~~~~~~~~~
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