oj.uz

Submission #940161

# Submission time Handle Problem Language Result Execution time Memory
940161 2024-03-07T06:15:47 Z irmuun Tug of War (BOI15_tug) C++17
71 / 100
 3000 ms 12076 KB 
#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n,k;
    cin>>n>>k;
    vector<int>l(2*n),r(2*n),s(2*n);
    set<int>v[2*n];
    for(int i=0;i<2*n;i++){
        cin>>l[i]>>r[i]>>s[i];
        l[i]--;
        r[i]--;
        r[i]+=n;
        v[l[i]].insert(i);
        v[r[i]].insert(i);
    }
    queue<int>q;
    bool ok=true;
    for(int i=0;i<2*n;i++){
        if(v[i].size()==0){
            cout<<"NO";
            return 0;
        }
        if(v[i].size()==1){
            q.push(i);
        }
    }
    vector<int>w(2*n,-1);
    vector<bool>used(2*n,0);
    while(!q.empty()){
        int x=q.front();
        q.pop();
        if(v[x].size()==0) continue;
        int y=*v[x].begin();
        used[y]=true;
        w[x]=s[y];
        v[l[y]].erase(y);
        v[r[y]].erase(y);
        if(v[l[y]].size()==1){
            q.push(l[y]);
        }
        if(v[r[y]].size()==1){
            q.push(r[y]);
        }
    }
    vector<int>adj[2*n];
    vector<int>num;
    function <void(int)> dfs=[&](int x){
        if(used[x]==true) return;
        num.pb(s[x]);
        used[x]=true;
        for(int y:adj[x]){
            dfs(y);
        }
    };
    for(int i=0;i<2*n;i++){
        if(w[i]==-1){
            int x=*v[i].begin();
            v[i].erase(v[i].begin());
            int y=*v[i].begin();
            v[i].erase(y);
            adj[x].pb(y);
            adj[y].pb(x);
        }
    }
    vector<int>dif;
    for(int i=0;i<2*n;i++){
        num.clear();
        dfs(i);
        if(!num.empty()){
            int cur=0;
            for(int j=0;j<(int)num.size();j++){
                if(j%2==0) cur+=num[j];
                else cur-=num[j];
            }
            dif.pb(abs(cur));
        }
    }
    int cur=0;
    for(int i=0;i<n;i++){
        if(w[i]>-1) cur+=w[i];
    }
    for(int i=n;i<2*n;i++){
        if(w[i]>-1) cur-=w[i];
    }
    dif.pb(abs(cur));
    sort(all(dif));
    vector<bool>can(20*n,0);
    int tot=0;
    can[0]=true;
    for(int x:dif){
        for(int j=tot;j>=0;j--){
            can[j+x]=(can[j]|can[j+x]);
        }
        can[x]=true;
        tot+=x;
    }
    int mn=1e9;
    for(int i=0;i<=20*n;i++){
        if(can[i]){
            mn=min(mn,abs(tot-2*i));
        }
    }
    if(mn<=k){
        cout<<"YES";
    }
    else{
        cout<<"NO";
    }
}

Compilation message

tug.cpp: In function 'int main()':
tug.cpp:27:10: warning: unused variable 'ok' [-Wunused-variable]
   27 |     bool ok=true;
      |          ^~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 600 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 600 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 28 ms 1116 KB Output is correct
27 Correct 12 ms 1112 KB Output is correct
28 Correct 29 ms 1116 KB Output is correct
29 Correct 14 ms 1116 KB Output is correct
30 Correct 28 ms 1116 KB Output is correct
31 Correct 12 ms 1116 KB Output is correct
32 Correct 28 ms 1120 KB Output is correct
33 Correct 12 ms 1116 KB Output is correct
34 Correct 7 ms 1116 KB Output is correct
35 Correct 12 ms 1112 KB Output is correct
36 Correct 29 ms 1112 KB Output is correct
37 Correct 12 ms 1116 KB Output is correct
38 Correct 29 ms 1116 KB Output is correct
39 Correct 12 ms 1116 KB Output is correct
40 Correct 28 ms 1124 KB Output is correct
41 Correct 12 ms 1116 KB Output is correct
42 Correct 29 ms 1116 KB Output is correct
43 Correct 12 ms 1288 KB Output is correct
44 Correct 30 ms 1372 KB Output is correct
45 Correct 12 ms 1368 KB Output is correct
46 Correct 31 ms 1116 KB Output is correct
47 Correct 2 ms 1116 KB Output is correct
48 Correct 9 ms 1276 KB Output is correct
49 Correct 9 ms 1116 KB Output is correct
50 Correct 119 ms 1268 KB Output is correct
51 Correct 117 ms 1112 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 4184 KB Output is correct
2 Correct 9 ms 3416 KB Output is correct
3 Correct 12 ms 4188 KB Output is correct
4 Correct 8 ms 3420 KB Output is correct
5 Correct 12 ms 4188 KB Output is correct
6 Correct 8 ms 3420 KB Output is correct
7 Correct 12 ms 4276 KB Output is correct
8 Correct 8 ms 3428 KB Output is correct
9 Correct 11 ms 4188 KB Output is correct
10 Correct 8 ms 3320 KB Output is correct
11 Correct 11 ms 4192 KB Output is correct
12 Correct 8 ms 3428 KB Output is correct
13 Correct 16 ms 4192 KB Output is correct
14 Correct 12 ms 4196 KB Output is correct
15 Correct 8 ms 3420 KB Output is correct
16 Correct 12 ms 4188 KB Output is correct
17 Correct 8 ms 3420 KB Output is correct
18 Correct 11 ms 4216 KB Output is correct
19 Correct 8 ms 3672 KB Output is correct
20 Correct 11 ms 4184 KB Output is correct
21 Correct 8 ms 3420 KB Output is correct
22 Correct 11 ms 4056 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 600 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 28 ms 1116 KB Output is correct
27 Correct 12 ms 1112 KB Output is correct
28 Correct 29 ms 1116 KB Output is correct
29 Correct 14 ms 1116 KB Output is correct
30 Correct 28 ms 1116 KB Output is correct
31 Correct 12 ms 1116 KB Output is correct
32 Correct 28 ms 1120 KB Output is correct
33 Correct 12 ms 1116 KB Output is correct
34 Correct 7 ms 1116 KB Output is correct
35 Correct 12 ms 1112 KB Output is correct
36 Correct 29 ms 1112 KB Output is correct
37 Correct 12 ms 1116 KB Output is correct
38 Correct 29 ms 1116 KB Output is correct
39 Correct 12 ms 1116 KB Output is correct
40 Correct 28 ms 1124 KB Output is correct
41 Correct 12 ms 1116 KB Output is correct
42 Correct 29 ms 1116 KB Output is correct
43 Correct 12 ms 1288 KB Output is correct
44 Correct 30 ms 1372 KB Output is correct
45 Correct 12 ms 1368 KB Output is correct
46 Correct 31 ms 1116 KB Output is correct
47 Correct 2 ms 1116 KB Output is correct
48 Correct 9 ms 1276 KB Output is correct
49 Correct 9 ms 1116 KB Output is correct
50 Correct 119 ms 1268 KB Output is correct
51 Correct 117 ms 1112 KB Output is correct
52 Correct 15 ms 4184 KB Output is correct
53 Correct 9 ms 3416 KB Output is correct
54 Correct 12 ms 4188 KB Output is correct
55 Correct 8 ms 3420 KB Output is correct
56 Correct 12 ms 4188 KB Output is correct
57 Correct 8 ms 3420 KB Output is correct
58 Correct 12 ms 4276 KB Output is correct
59 Correct 8 ms 3428 KB Output is correct
60 Correct 11 ms 4188 KB Output is correct
61 Correct 8 ms 3320 KB Output is correct
62 Correct 11 ms 4192 KB Output is correct
63 Correct 8 ms 3428 KB Output is correct
64 Correct 16 ms 4192 KB Output is correct
65 Correct 12 ms 4196 KB Output is correct
66 Correct 8 ms 3420 KB Output is correct
67 Correct 12 ms 4188 KB Output is correct
68 Correct 8 ms 3420 KB Output is correct
69 Correct 11 ms 4216 KB Output is correct
70 Correct 8 ms 3672 KB Output is correct
71 Correct 11 ms 4184 KB Output is correct
72 Correct 8 ms 3420 KB Output is correct
73 Correct 11 ms 4056 KB Output is correct
74 Execution timed out 3042 ms 12076 KB Time limit exceeded
75 Halted 0 ms 0 KB -