답안 #158211

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
158211 2019-10-15T13:48:41 Z maruii 철인 이종 경기 (APIO18_duathlon) C++14
컴파일 오류
0 ms 0 KB
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int N, M, dfn[100005], dfnn, low[100005], cpn[100005], cpnn, sz[100005], T[100005];
vector<int> edge[100005];
vector<pii> bdge[100005];
ll ans;

void dfs(int x, int p) {
	dfn[x] = low[x] = ++dfnn;
	N++;
	for (auto i : edge[x]) {
		if (i == p) continue;
		if (dfn[i]) {
			if (dfn[i] < dfn[x]) low[x] = min(low[x], dfn[i]);
			continue;
		}
		dfs(i, x);
		low[x] = min(low[x], low[i]);
	}
}

void bcc(int x, int c) {
	cpn[x] = c;
	sz[c]++;
	for (auto i : edge[x]) {
		if (cpn[i]) continue;
		if (low[i] == dfn[i]) {
			bdge[++cpnn].emplace_back(c, i);
			bdge[c].emplace_back(cpnn, x);
			bcc(i, cpnn);
		}
		else bcc(i, c);
	}
}

void calc(int x, int p) {
	ll n = sz[x], t = (N - n) * (N - n);
	ans += n * (n - 1) * (n - 2) + 2 * (n - 1) * (n - 1) * (N - n);
	for (auto i : bdge[x]) {
		if (i.ff == p) continue;
		calc(i.ff, x);
		ans -= 2 * (n - 1) * sz[i.ff] * T[i.ss];
		T[i.ss] += sz[i.ff];
		sz[x] += sz[i.ff];
		t -= 1ll * sz[i.ff] * sz[i.ff];
	}
	ans += n * (t - 1ll * (N - sz[x]) * (N - sz[x]));
}

int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int n; cin >> n >> M;
	for (int i = 0; i < M; ++i) {
		int x, y; cin >> x >> y;
		edge[x].push_back(y);
		edge[y].push_back(x);
	}
	for (int i = 1; i <= n; ++i) {
		if (dfn[i]) continue;
		N = 0;
		dfs(i, i);
		bcc(i, ++cpnn);
		calc(cpnn, cpnn);
	}
	cout << ans;
	return 0;
}

Compilation message

count_triplets.cpp:7:8: error: 'pii' was not declared in this scope
 vector<pii> bdge[100005];
        ^~~
count_triplets.cpp:7:11: error: template argument 1 is invalid
 vector<pii> bdge[100005];
           ^
count_triplets.cpp:7:11: error: template argument 2 is invalid
count_triplets.cpp: In function 'void bcc(int, int)':
count_triplets.cpp:30:17: error: request for member 'emplace_back' in 'bdge[(++ cpnn)]', which is of non-class type 'int'
    bdge[++cpnn].emplace_back(c, i);
                 ^~~~~~~~~~~~
count_triplets.cpp:31:12: error: request for member 'emplace_back' in 'bdge[c]', which is of non-class type 'int'
    bdge[c].emplace_back(cpnn, x);
            ^~~~~~~~~~~~
count_triplets.cpp: In function 'void calc(int, int)':
count_triplets.cpp:41:22: error: 'begin' was not declared in this scope
  for (auto i : bdge[x]) {
                      ^
count_triplets.cpp:41:22: note: suggested alternatives:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from count_triplets.cpp:1:
/usr/include/c++/7/valarray:1211:5: note:   'std::begin'
     begin(const valarray<_Tp>& __va)
     ^~~~~
/usr/include/c++/7/valarray:1211:5: note:   'std::begin'
count_triplets.cpp:41:22: error: 'end' was not declared in this scope
  for (auto i : bdge[x]) {
                      ^
count_triplets.cpp:41:22: note: suggested alternatives:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:95:0,
                 from count_triplets.cpp:1:
/usr/include/c++/7/valarray:1231:5: note:   'std::end'
     end(const valarray<_Tp>& __va)
     ^~~
/usr/include/c++/7/valarray:1231:5: note:   'std::end'