Submission #653139

#TimeUsernameProblemLanguageResultExecution timeMemory
653139aryan12Three Friends (BOI14_friends)C++17
100 / 100
46 ms6072 KiB
#include <bits/stdc++.h> using namespace std; string s,t; int l,r,i,p,n,f,g; bool c(){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 = c(); t = s.substr(n - n / 2, n / 2); l = 0; r = n / 2; g = c(); 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"; } }

Compilation message (stderr)

friends.cpp: In function 'bool c()':
friends.cpp:5:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | bool c(){p=0;for(i=l;i<=r;i++){if(p!=t.size()&&t[p]==s[i])p++;}return(p==t.size());}
      |                                   ~^~~~~~~~~~
friends.cpp:5:72: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | bool c(){p=0;for(i=l;i<=r;i++){if(p!=t.size()&&t[p]==s[i])p++;}return(p==t.size());}
      |                                                                       ~^~~~~~~~~~
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