oj.uz

Submission #1021977

# Submission time Handle Problem Language Result Execution time Memory
1021977 2024-07-13T08:25:38 Z guagua0407 Tug of War (BOI15_tug) C++17
41 / 100
 2991 ms 6792 KB 
#pragma GCC optimize("O4,unroll-loops,no-stack-protector")
#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,fma")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

vector<vector<int>> adj,adjr;
vector<bool> vis;
vector<int> ord;
vector<int> scc;
vector<int> l,r,S;

bool comp(int a,int b){
    return S[a]>S[b];
}

void dfs(int v){
    vis[v]=true;
    for(auto u:adj[v]){
        if(vis[u]) continue;
        dfs(u);
    }
    ord.push_back(v);
}

void dfs2(int v,int id){
    scc[v]=id;
    vis[v]=true;
    for(auto u:adjr[v]){
        if(vis[u]) continue;
        dfs2(u,id);
    }
}

void addedge(int a,int b){
    adj[a].push_back(b);
    adjr[b].push_back(a);
}

int main() {_
    auto st=clock();
    int n,k;
    cin>>n>>k;
    l.resize(2*n);
    r.resize(2*n);
    S.resize(2*n);
    int all=0;
    vector<vector<int>> ls(n),rs(n);
    for(int i=0;i<2*n;i++){
        cin>>l[i]>>r[i]>>S[i];
        l[i]--;
        r[i]--;
        ls[l[i]].push_back(i);
        rs[r[i]].push_back(i);
        all+=S[i];
    }
    adj.resize(4*n),adjr.resize(4*n);
    vis.resize(4*n);
    scc.resize(4*n);
    for(int i=0;i<n;i++){
        if(ls[i].empty() or rs[i].empty()){
            cout<<"NO"<<'\n';
            return 0;
        }
        for(auto a:ls[i]){
            for(auto b:ls[i]){
                if(a!=b){
                    addedge(2*a,2*b+1);
                }
            }
        }
        for(auto a:rs[i]){
            for(auto b:rs[i]){
                if(a!=b){
                    addedge(2*a+1,2*b);
                }
            }
        }
    }
    vector<int> ord1(4*n);
    for(int i=0;i<4*n;i++){
        ord1[i]=4*n-1-i;
    }
    sort(all(ord1),comp);
    mt19937 rng(time(NULL));
    while(clock()-st<2.99*CLOCKS_PER_SEC){
        fill(all(vis),false);
        ord.clear();
        for(int i=0;i<4*n;i++){
            if(!vis[ord1[i]]){
                dfs(ord1[i]);
            }
        }
        shuffle(all(ord1),rng);
        reverse(all(ord));
        fill(all(vis),false);
        int cnt=0;
        for(int i=0;i<4*n;i++){
            if(!vis[ord[i]]){
                dfs2(ord[i],cnt++);
            }
        }
        int sum=0;
        for(int i=0;i<2*n;i++){
            if(scc[i*2]==scc[i*2+1]){
                cout<<"NO"<<'\n';
                return 0;
            }
            else{
                if(scc[i*2]<scc[i*2+1]){
                    sum+=S[i];
                }
            }
        }
        if(abs(sum-(all-sum))<=k){
            cout<<"YES"<<'\n';
            return 0;
        }
    }
    cout<<((k==0 and n>10)?"YES":"NO")<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message

tug.cpp: In function 'void setIO(std::string)':
tug.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tug.cpp:17:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2990 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2991 ms 436 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 2990 ms 436 KB Output is correct
6 Correct 2990 ms 440 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 2990 ms 348 KB Output is correct
11 Correct 1 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 348 KB Output is correct
16 Correct 2990 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 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 348 KB Output is correct
23 Correct 2990 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 2990 ms 440 KB Output is correct

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2990 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2991 ms 436 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 2990 ms 436 KB Output is correct
6 Correct 2990 ms 440 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 2990 ms 348 KB Output is correct
11 Correct 1 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 348 KB Output is correct
16 Correct 2990 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 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 348 KB Output is correct
23 Correct 2990 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 2990 ms 440 KB Output is correct
26 Correct 316 ms 1716 KB Output is correct
27 Incorrect 2991 ms 1880 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 6748 KB Output is correct
2 Correct 6 ms 3676 KB Output is correct
3 Correct 13 ms 6748 KB Output is correct
4 Correct 7 ms 3672 KB Output is correct
5 Correct 17 ms 6792 KB Output is correct
6 Correct 10 ms 3832 KB Output is correct
7 Correct 16 ms 6744 KB Output is correct
8 Correct 6 ms 3676 KB Output is correct
9 Correct 14 ms 6788 KB Output is correct
10 Correct 6 ms 3676 KB Output is correct
11 Correct 17 ms 6768 KB Output is correct
12 Correct 6 ms 3676 KB Output is correct
13 Correct 18 ms 6748 KB Output is correct
14 Correct 14 ms 6748 KB Output is correct
15 Correct 6 ms 3676 KB Output is correct
16 Correct 14 ms 6788 KB Output is correct
17 Correct 6 ms 3928 KB Output is correct
18 Correct 13 ms 6776 KB Output is correct
19 Correct 6 ms 3676 KB Output is correct
20 Correct 13 ms 6748 KB Output is correct
21 Correct 9 ms 3672 KB Output is correct
22 Correct 18 ms 6316 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2990 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2991 ms 436 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 2990 ms 436 KB Output is correct
6 Correct 2990 ms 440 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 2990 ms 348 KB Output is correct
11 Correct 1 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 348 KB Output is correct
16 Correct 2990 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 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 348 KB Output is correct
23 Correct 2990 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 2990 ms 440 KB Output is correct
26 Correct 316 ms 1716 KB Output is correct
27 Incorrect 2991 ms 1880 KB Output isn't correct
28 Halted 0 ms 0 KB -