제출 #80148

#제출 시각아이디문제언어결과실행 시간메모리
80148SherazinTeleporters (IOI08_teleporters)C++14
75 / 100
1083 ms66560 KiB
#include <bits/stdc++.h> #define pii pair<int, int> #define x first #define y second using namespace std; const int N = 2e6+5; int n, m; int chk[N], sz[N], comp; vector<int> pos; map<int, int> mp; int get(int x) { return lower_bound(pos.begin(), pos.end(), x) - pos.begin(); } int main() { scanf("%d %d", &n, &m); for(int i = 1, a, b; i <= n; i++) { scanf("%d %d", &a, &b); pos.emplace_back(a), pos.emplace_back(b); mp[a] = b, mp[b] = a; } pos.emplace_back(1e9); sort(pos.begin(), pos.end()); for(int i = 0; i < 2*n; i++) if(!chk[i]) { chk[i] = ++comp; queue<int> Q; Q.emplace(i); while(!Q.empty()) { int u = Q.front(); Q.pop(); ++sz[comp]; int v = get(mp[pos[u]]) + 1; if(chk[v] || v == 2*n) continue; chk[v] = comp; Q.emplace(v); } } int ans = sz[1]; priority_queue<int> Q; for(int i = 2; i <= comp; i++) Q.emplace(sz[i]); while(!Q.empty() && m) { int z = Q.top(); Q.pop(); ans += z + 2, --m; } ans += 2*(m - (m & 1)) + (m & 1); printf("%d\n", ans); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

teleporters.cpp: In function 'int main()':
teleporters.cpp:19:13: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
        scanf("%d %d", &n, &m);
        ~~~~~^~~~~~~~~~~~~~~~~
teleporters.cpp:21:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
               scanf("%d %d", &a, &b);
               ~~~~~^~~~~~~~~~~~~~~~~
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