Submission #573709

#TimeUsernameProblemLanguageResultExecution timeMemory
573709DevigoExperimental Charges (NOI19_charges)C++14
Compilation error
0 ms0 KiB
#include "bits/stdc++.h" using namespace std; #define int long long const int w = 1000050; int n, m; char c; vector<int> parent((int) 1e7), siz((int) 1e7, 1); int findpar(int x) { if(x == parent[x]) return x; return parent[x] = findpar(parent[x]); } void unite(int x, int y) { x = findpar(x); y = findpar(y); if(x == y) return; if(siz[y] > siz[x]) swap(x, y); parent[y] = x; siz[x] += siz[y]; } signed main() { cin >> n >> m; for(int i = 0; i < (int) 1e7; ++i) parent[i] = i; int x, y; while(m--) { cin >> c; cin >> x >> y; if(c == 'A') { unite(x, y + w); unite(x + w, y); } else if(c == 'R') { unite(x, y); unite(x + w, y + w); } else { int p, q, s; p = findpar(x); q = findpar(y); r = findpar(x + w); //s = findpar(y + w); //if(p == q && p == s) cout << "?"; if (p == q) cout << "R"; else if (p == r) cout << "A"; else cout << "?"; cout << "\n"; } } }

Compilation message (stderr)

charges.cpp: In function 'int main()':
charges.cpp:43:13: error: 'r' was not declared in this scope
   43 |             r = findpar(x + w);
      |             ^
charges.cpp:40:23: warning: unused variable 's' [-Wunused-variable]
   40 |             int p, q, s;
      |                       ^