oj.uz

답안 #59321

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
59321 2018-07-21T13:59:57 Z wjoao 철인 이종 경기 (APIO18_duathlon) C++11
25 / 100
 54 ms 1736 KB 
#include<bits/stdc++.h>
#define maxn 10010
#define ll long long

using namespace std;

vector<ll> g[maxn];
ll n, m, a, b, t=1, tempo_atual, tempo[maxn], sol, grupo[maxn], filhos[maxn], filhos_fora_grupo[maxn], filhos_grupo[maxn], mark[maxn];


void dfs(int v, int p){
    tempo[v] = tempo_atual++;

    int grupo_achado = 0;

    filhos[v] = 1;
    filhos_fora_grupo[v] = 1;

    for(int i = 0; i < g[v].size(); i++){
        int u = g[v][i];

        if( u == p ) continue;

        if( tempo[u] > 0 && grupo[u] != 0 && tempo[u] < tempo[v] ){
            grupo_achado = grupo[u];
            continue;
        }
        if( tempo[u] > 0 ) continue;

        dfs(u, v);
        if( grupo[u] ){
            grupo_achado = grupo[u];
        }else{
            filhos_fora_grupo[v] += filhos[u];
        }
        filhos[v] += filhos[u];
    }
    grupo[v] = grupo_achado;
}

void solve_group(int v, int _grupo){
    mark[v] = true;

    for(int i = 0; i < g[v].size(); i++){
        int u = g[v][i];

        if(mark[u]) continue;

        if(grupo[u] == _grupo){
            solve_group(u, _grupo);
        }
    }
    // cout << "solve_group v: " << v << " QUantidade de filhos do grupo " << filhos_grupo[_grupo] << " filhos fora do grupo: " <<  filhos_fora_grupo[v] << endl;
    sol += (filhos_grupo[_grupo]-filhos_fora_grupo[v])*filhos_fora_grupo[v];
}

void solve_c(int c){
    // cout << endl << endl << "===> SOLVE: " << c << endl;
    memset(tempo, 0, sizeof tempo);
    memset(grupo, 0, sizeof grupo);

    tempo_atual = 1;
    tempo[c] = tempo_atual++;
    int grupo_atual = 0;
    filhos[c] = 0;

    vector<int> componentes;
    for(int i = 0; i < g[c].size(); i++){
        int u = g[c][i];
        if(grupo[u] != 0) continue;
        grupo[c] = ++grupo_atual;
        componentes.push_back(u);
        dfs(u, c);
        // cout << "Filhos de " << u << " são " << filhos[u] << endl;
        filhos_grupo[grupo_atual] = filhos[u];
        filhos[c] += filhos[u];
    }
    for(int i = 0; i < g[c].size(); i++){
        int u = g[c][i];
        // cout << "Grupo u: " << u << " é " << grupo[u] << endl;
    }
    // cout << "Raiz " << c << " Tem " << filhos[c] << " Filhos " << endl;
    for(int i = 0; i < componentes.size(); i++ ){
        int u = componentes[i];
        // cout << "Componente u: " << u << " Com filhos: " << filhos[u] << endl;
        sol += (filhos[c]-filhos[u])*filhos[u];
        if(grupo[u] != 0){
            memset(mark, 0, sizeof mark);
            mark[c] = true;
            solve_group(u, grupo[u]);
        }
    }
}


int main(){
    scanf(" %lld %lld", &n, &m);

    for(int i = 0; i < m; i++){
        scanf(" %lld %lld", &a, &b);
        g[a].push_back(b);
        g[b].push_back(a);
    }
    for(int i = 1; i <= n; i++){
        solve_c(i);
        // cout << "i: " << i << " Sol após i: " << sol << endl;
    }
    printf("%lld\n", sol);
    return 0;
}

Compilation message

count_triplets.cpp: In function 'void dfs(int, int)':
count_triplets.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < g[v].size(); i++){
                    ~~^~~~~~~~~~~~~
count_triplets.cpp: In function 'void solve_group(int, int)':
count_triplets.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < g[v].size(); i++){
                    ~~^~~~~~~~~~~~~
count_triplets.cpp: In function 'void solve_c(int)':
count_triplets.cpp:68:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < g[c].size(); i++){
                    ~~^~~~~~~~~~~~~
count_triplets.cpp:78:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < g[c].size(); i++){
                    ~~^~~~~~~~~~~~~
count_triplets.cpp:79:13: warning: unused variable 'u' [-Wunused-variable]
         int u = g[c][i];
             ^
count_triplets.cpp:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < componentes.size(); i++ ){
                    ~~^~~~~~~~~~~~~~~~~~~~
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:97:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf(" %lld %lld", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
count_triplets.cpp:100:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" %lld %lld", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 3 ms 1000 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 1360 KB Output is correct
2 Correct 35 ms 1420 KB Output is correct
3 Correct 33 ms 1484 KB Output is correct
4 Correct 39 ms 1612 KB Output is correct
5 Correct 38 ms 1612 KB Output is correct
6 Correct 40 ms 1612 KB Output is correct
7 Correct 42 ms 1612 KB Output is correct
8 Correct 51 ms 1612 KB Output is correct
9 Correct 49 ms 1612 KB Output is correct
10 Correct 36 ms 1612 KB Output is correct
11 Correct 32 ms 1612 KB Output is correct
12 Correct 25 ms 1612 KB Output is correct
13 Correct 19 ms 1612 KB Output is correct
14 Correct 15 ms 1612 KB Output is correct
15 Correct 13 ms 1612 KB Output is correct
16 Correct 11 ms 1612 KB Output is correct
17 Correct 33 ms 1612 KB Output is correct
18 Correct 26 ms 1612 KB Output is correct
19 Correct 31 ms 1612 KB Output is correct
20 Correct 32 ms 1612 KB Output is correct

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 4 ms 1612 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 1612 KB Output is correct
2 Correct 40 ms 1612 KB Output is correct
3 Correct 39 ms 1612 KB Output is correct
4 Correct 48 ms 1612 KB Output is correct
5 Correct 41 ms 1612 KB Output is correct
6 Correct 50 ms 1616 KB Output is correct
7 Correct 47 ms 1616 KB Output is correct
8 Correct 50 ms 1720 KB Output is correct
9 Correct 51 ms 1720 KB Output is correct
10 Correct 52 ms 1720 KB Output is correct
11 Correct 48 ms 1720 KB Output is correct
12 Correct 54 ms 1736 KB Output is correct
13 Correct 51 ms 1736 KB Output is correct
14 Correct 50 ms 1736 KB Output is correct
15 Correct 54 ms 1736 KB Output is correct
16 Correct 47 ms 1736 KB Output is correct
17 Correct 33 ms 1736 KB Output is correct
18 Correct 21 ms 1736 KB Output is correct
19 Correct 18 ms 1736 KB Output is correct
20 Correct 16 ms 1736 KB Output is correct
21 Correct 39 ms 1736 KB Output is correct
22 Correct 33 ms 1736 KB Output is correct
23 Correct 44 ms 1736 KB Output is correct
24 Correct 35 ms 1736 KB Output is correct
25 Correct 11 ms 1736 KB Output is correct
26 Correct 11 ms 1736 KB Output is correct
27 Correct 11 ms 1736 KB Output is correct

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 3 ms 1736 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 764 KB Output isn't correct
2 Halted 0 ms 0 KB -