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Submission #60177

# Submission time Handle Problem Language Result Execution time Memory
60177 2018-07-23T20:18:16 Z duality Duathlon (APIO18_duathlon) C++11
31 / 100
 369 ms 35564 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long int LLI;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;

vi adjList[100000];
int disc[100000],low[100000],art[100000],num = 0;
vi com[100000];
vpii S;
int bcc = 0;
int doDFS(int u,int p) {
    int i,c = 0;
    disc[u] = low[u] = num++;
    for (i = 0; i < adjList[u].size(); i++) {
        int v = adjList[u][i];
        if (disc[v] == -1) {
            c++;
            S.pb(mp(u,v));
            doDFS(v,u);
            low[u] = min(low[u],low[v]);
            if (((p == -1) && (c > 1)) || ((p != -1) && (low[v] >= disc[u]))) {
                art[u] = 1;
                while (1) {
                    int uu = S.back().first,vv = S.back().second;
                    S.pop_back();
                    com[bcc].pb(uu),com[bcc].pb(vv);
                    if ((u == uu) && (v == vv)) break;
                }
                bcc++;
            }
        }
        else if ((v != p) && (disc[v] < disc[u])) low[u] = min(low[u],disc[v]),S.pb(mp(u,v));
    }
    return 0;
}
int size[100000];
vi adjList2[200000];
LLI ans = 0;
int visited[200000],sub[200000];
int doDFS2(int u,int p) {
    int i;
    sub[u] = (u < bcc) ? size[u]:0;
    visited[u] = 1;
    for (i = 0; i < adjList2[u].size(); i++) {
        int v = adjList2[u][i];
        if (v != p) sub[u] += doDFS2(v,u);
    }
    return sub[u];
}
int doDFS3(int u,int p,int r) {
    int i;
    if (u < bcc) {
        ans += 2LL*size[u]*sub[u]*(sub[r]-sub[u]+size[u]);
        ans -= (LLI) size[u]*size[u]*size[u];
    }
    for (i = 0; i < adjList2[u].size(); i++) {
        int v = adjList2[u][i];
        if (v != p) doDFS3(v,u,r);
    }
    return 0;
}
int doDFS4(int u,int p,int s,int sum) {
    int i;
    if (u < bcc) {
        sum += com[u].size()-1;
        ans += (LLI) (com[s].size()-1)*(com[u].size()-1)*(sum);
    }
    for (i = 0; i < adjList2[u].size(); i++) {
        int v = adjList2[u][i];
        if (v != p) doDFS4(v,u,s,sum);
    }
    return 0;
}
int main() {
    int i;
    int n,m,u,v;
    scanf("%d %d",&n,&m);
    for (i = 0; i < m; i++) {
        scanf("%d %d",&u,&v);
        u--,v--;
        adjList[u].pb(v);
        adjList[v].pb(u);
    }

    int j;
    for (i = 0; i < n; i++) disc[i] = low[i] = -1;
    for (i = 0; i < n; i++) {
        if (disc[i] == -1) {
            doDFS(i,-1);
            if (!S.empty()) {
                while (!S.empty()) {
                    int u = S.back().first,v = S.back().second;
                    S.pop_back();
                    com[bcc].pb(u),com[bcc].pb(v);
                }
                bcc++;
            }
        }
    }
    for (i = 0; i < bcc; i++) {
        sort(com[i].begin(),com[i].end());
        com[i].resize(unique(com[i].begin(),com[i].end())-com[i].begin());
        for (j = 0; j < com[i].size(); j++) {
            if (art[com[i][j]]) {
                adjList2[i].pb(com[i][j]+bcc);
                adjList2[com[i][j]+bcc].pb(i);
            }
        }
        size[i] = com[i].size()-1;
        ans += (LLI) com[i].size()*(com[i].size()-1)*(com[i].size()-2);
        ans -= (LLI) size[i]*size[i]*size[i];
        ans += (LLI) size[i]*size[i];
    }
    for (i = 0; i < bcc; i++) {
        if (!visited[i]) {
            doDFS2(i,-1),doDFS3(i,-1,i);
            ans -= (LLI) sub[i]*sub[i];
        }
    }
    //for (i = 0; i < bcc; i++) doDFS4(i,-1,i,0);
    printf("%lld\n",ans);

    return 0;
}

Compilation message

count_triplets.cpp: In function 'int doDFS(int, int)':
count_triplets.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~
count_triplets.cpp: In function 'int doDFS2(int, int)':
count_triplets.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList2[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~~
count_triplets.cpp: In function 'int doDFS3(int, int, int)':
count_triplets.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList2[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~~
count_triplets.cpp: In function 'int doDFS4(int, int, int, int)':
count_triplets.cpp:72:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList2[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~~
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:107:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < com[i].size(); j++) {
                     ~~^~~~~~~~~~~~~~~
count_triplets.cpp:81:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~~
count_triplets.cpp:83:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&u,&v);
         ~~~~~^~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9836 KB Output is correct
3 Correct 12 ms 9836 KB Output is correct
4 Correct 10 ms 9836 KB Output is correct
5 Correct 10 ms 9836 KB Output is correct
6 Correct 10 ms 9868 KB Output is correct
7 Incorrect 10 ms 9996 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9836 KB Output is correct
3 Correct 12 ms 9836 KB Output is correct
4 Correct 10 ms 9836 KB Output is correct
5 Correct 10 ms 9836 KB Output is correct
6 Correct 10 ms 9868 KB Output is correct
7 Incorrect 10 ms 9996 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 142 ms 27060 KB Output is correct
2 Correct 138 ms 27212 KB Output is correct
3 Correct 271 ms 27212 KB Output is correct
4 Correct 190 ms 27212 KB Output is correct
5 Correct 252 ms 27212 KB Output is correct
6 Correct 320 ms 27212 KB Output is correct
7 Correct 205 ms 27212 KB Output is correct
8 Correct 252 ms 27212 KB Output is correct
9 Correct 226 ms 27212 KB Output is correct
10 Correct 222 ms 27212 KB Output is correct
11 Correct 167 ms 27212 KB Output is correct
12 Correct 157 ms 27212 KB Output is correct
13 Correct 134 ms 27212 KB Output is correct
14 Correct 132 ms 27212 KB Output is correct
15 Correct 94 ms 27212 KB Output is correct
16 Correct 111 ms 27212 KB Output is correct
17 Correct 16 ms 27212 KB Output is correct
18 Correct 13 ms 27212 KB Output is correct
19 Correct 15 ms 27212 KB Output is correct
20 Correct 14 ms 27212 KB Output is correct
21 Correct 12 ms 27212 KB Output is correct
22 Correct 11 ms 27212 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 27212 KB Output is correct
2 Correct 11 ms 27212 KB Output is correct
3 Correct 12 ms 27212 KB Output is correct
4 Correct 14 ms 27212 KB Output is correct
5 Correct 15 ms 27212 KB Output is correct
6 Correct 15 ms 27212 KB Output is correct
7 Correct 14 ms 27212 KB Output is correct
8 Correct 15 ms 27212 KB Output is correct
9 Correct 15 ms 27212 KB Output is correct
10 Correct 16 ms 27212 KB Output is correct
11 Correct 15 ms 27212 KB Output is correct
12 Correct 14 ms 27212 KB Output is correct
13 Correct 14 ms 27212 KB Output is correct
14 Correct 13 ms 27212 KB Output is correct
15 Correct 14 ms 27212 KB Output is correct
16 Correct 12 ms 27212 KB Output is correct
17 Correct 12 ms 27212 KB Output is correct
18 Correct 11 ms 27212 KB Output is correct
19 Correct 11 ms 27212 KB Output is correct
20 Correct 10 ms 27212 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 265 ms 27212 KB Output is correct
2 Correct 170 ms 27212 KB Output is correct
3 Correct 178 ms 27212 KB Output is correct
4 Correct 198 ms 27212 KB Output is correct
5 Correct 189 ms 27212 KB Output is correct
6 Correct 249 ms 35564 KB Output is correct
7 Correct 369 ms 35564 KB Output is correct
8 Correct 214 ms 35564 KB Output is correct
9 Correct 206 ms 35564 KB Output is correct
10 Correct 193 ms 35564 KB Output is correct
11 Correct 182 ms 35564 KB Output is correct
12 Correct 171 ms 35564 KB Output is correct
13 Correct 233 ms 35564 KB Output is correct
14 Correct 184 ms 35564 KB Output is correct
15 Correct 132 ms 35564 KB Output is correct
16 Correct 98 ms 35564 KB Output is correct
17 Correct 118 ms 35564 KB Output is correct
18 Correct 149 ms 35564 KB Output is correct
19 Correct 151 ms 35564 KB Output is correct
20 Correct 126 ms 35564 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 35564 KB Output is correct
2 Correct 15 ms 35564 KB Output is correct
3 Incorrect 13 ms 35564 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 308 ms 35564 KB Output is correct
2 Correct 272 ms 35564 KB Output is correct
3 Incorrect 230 ms 35564 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9836 KB Output is correct
3 Correct 12 ms 9836 KB Output is correct
4 Correct 10 ms 9836 KB Output is correct
5 Correct 10 ms 9836 KB Output is correct
6 Correct 10 ms 9868 KB Output is correct
7 Incorrect 10 ms 9996 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9836 KB Output is correct
3 Correct 12 ms 9836 KB Output is correct
4 Correct 10 ms 9836 KB Output is correct
5 Correct 10 ms 9836 KB Output is correct
6 Correct 10 ms 9868 KB Output is correct
7 Incorrect 10 ms 9996 KB Output isn't correct
8 Halted 0 ms 0 KB -