oj.uz

Submission #60207

# Submission time Handle Problem Language Result Execution time Memory
60207 2018-07-23T20:41:49 Z duality Duathlon (APIO18_duathlon) C++11
31 / 100
 358 ms 35432 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 += size[u];
        ans += (LLI) size[s]*size[u]*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 12 ms 9720 KB Output is correct
2 Correct 13 ms 9832 KB Output is correct
3 Correct 14 ms 9888 KB Output is correct
4 Correct 11 ms 9888 KB Output is correct
5 Correct 14 ms 9888 KB Output is correct
6 Correct 13 ms 9888 KB Output is correct
7 Incorrect 11 ms 9944 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 9720 KB Output is correct
2 Correct 13 ms 9832 KB Output is correct
3 Correct 14 ms 9888 KB Output is correct
4 Correct 11 ms 9888 KB Output is correct
5 Correct 14 ms 9888 KB Output is correct
6 Correct 13 ms 9888 KB Output is correct
7 Incorrect 11 ms 9944 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 186 ms 27204 KB Output is correct
2 Correct 158 ms 27204 KB Output is correct
3 Correct 222 ms 27204 KB Output is correct
4 Correct 240 ms 27204 KB Output is correct
5 Correct 199 ms 27204 KB Output is correct
6 Correct 271 ms 27204 KB Output is correct
7 Correct 274 ms 27204 KB Output is correct
8 Correct 306 ms 27204 KB Output is correct
9 Correct 282 ms 27204 KB Output is correct
10 Correct 198 ms 27204 KB Output is correct
11 Correct 165 ms 27204 KB Output is correct
12 Correct 192 ms 27204 KB Output is correct
13 Correct 137 ms 27204 KB Output is correct
14 Correct 164 ms 27204 KB Output is correct
15 Correct 97 ms 27204 KB Output is correct
16 Correct 115 ms 27204 KB Output is correct
17 Correct 18 ms 27204 KB Output is correct
18 Correct 16 ms 27204 KB Output is correct
19 Correct 16 ms 27204 KB Output is correct
20 Correct 16 ms 27204 KB Output is correct
21 Correct 18 ms 27204 KB Output is correct
22 Correct 14 ms 27204 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 27204 KB Output is correct
2 Correct 15 ms 27204 KB Output is correct
3 Correct 14 ms 27204 KB Output is correct
4 Correct 12 ms 27204 KB Output is correct
5 Correct 16 ms 27204 KB Output is correct
6 Correct 15 ms 27204 KB Output is correct
7 Correct 16 ms 27204 KB Output is correct
8 Correct 13 ms 27204 KB Output is correct
9 Correct 14 ms 27204 KB Output is correct
10 Correct 16 ms 27204 KB Output is correct
11 Correct 14 ms 27204 KB Output is correct
12 Correct 13 ms 27204 KB Output is correct
13 Correct 13 ms 27204 KB Output is correct
14 Correct 13 ms 27204 KB Output is correct
15 Correct 11 ms 27204 KB Output is correct
16 Correct 11 ms 27204 KB Output is correct
17 Correct 16 ms 27204 KB Output is correct
18 Correct 15 ms 27204 KB Output is correct
19 Correct 14 ms 27204 KB Output is correct
20 Correct 13 ms 27204 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 197 ms 27204 KB Output is correct
2 Correct 209 ms 27204 KB Output is correct
3 Correct 215 ms 27204 KB Output is correct
4 Correct 198 ms 27204 KB Output is correct
5 Correct 207 ms 27204 KB Output is correct
6 Correct 298 ms 35432 KB Output is correct
7 Correct 358 ms 35432 KB Output is correct
8 Correct 266 ms 35432 KB Output is correct
9 Correct 349 ms 35432 KB Output is correct
10 Correct 294 ms 35432 KB Output is correct
11 Correct 234 ms 35432 KB Output is correct
12 Correct 205 ms 35432 KB Output is correct
13 Correct 250 ms 35432 KB Output is correct
14 Correct 220 ms 35432 KB Output is correct
15 Correct 199 ms 35432 KB Output is correct
16 Correct 128 ms 35432 KB Output is correct
17 Correct 149 ms 35432 KB Output is correct
18 Correct 151 ms 35432 KB Output is correct
19 Correct 185 ms 35432 KB Output is correct
20 Correct 136 ms 35432 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 35432 KB Output is correct
2 Correct 13 ms 35432 KB Output is correct
3 Incorrect 15 ms 35432 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 217 ms 35432 KB Output is correct
2 Correct 318 ms 35432 KB Output is correct
3 Incorrect 275 ms 35432 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 9720 KB Output is correct
2 Correct 13 ms 9832 KB Output is correct
3 Correct 14 ms 9888 KB Output is correct
4 Correct 11 ms 9888 KB Output is correct
5 Correct 14 ms 9888 KB Output is correct
6 Correct 13 ms 9888 KB Output is correct
7 Incorrect 11 ms 9944 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 9720 KB Output is correct
2 Correct 13 ms 9832 KB Output is correct
3 Correct 14 ms 9888 KB Output is correct
4 Correct 11 ms 9888 KB Output is correct
5 Correct 14 ms 9888 KB Output is correct
6 Correct 13 ms 9888 KB Output is correct
7 Incorrect 11 ms 9944 KB Output isn't correct
8 Halted 0 ms 0 KB -