제출 #56479

#제출 시각아이디문제언어결과실행 시간메모리
56479aquablitz11Teleporters (IOI08_teleporters)C++14
90 / 100
789 ms66560 KiB
#include <bits/stdc++.h> using namespace std; const int N = 1000002; int n, m; int A[N], B[N], pos[2*N], coord[2*N], nxt[2*N], cc; bool vis[2*N]; int main() { scanf("%d%d", &n, &m); for (int i = 0; i < n; ++i) { scanf("%d%d", &A[i], &B[i]); coord[2*i+1] = A[i]; coord[2*i+2] = B[i]; } sort(coord, coord+2*n+1); for (int i = 0; i < 2*n+1; ++i) pos[coord[i]] = i; for (int i = 0; i < n; ++i) { nxt[pos[A[i]]-1] = pos[B[i]]; nxt[pos[B[i]]-1] = pos[A[i]]; } int ans = 0; for (int s = 0; s < 2*n; ++s) { if (vis[s]) continue; for (int u = s, c = 1; ; ++c) { vis[u] = true; u = nxt[u]; if (vis[u]) { A[cc++] = c; break; } else if (u == 2*n) { ans = c; break; } } } sort(A, A+cc); while (m--) { if (cc > 0) { ans += A[--cc]+2; } else { ++ans; A[cc++] = 1; } } printf("%d\n", ans); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

teleporters.cpp: In function 'int main()':
teleporters.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
teleporters.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &A[i], &B[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
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