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Submission #628646

# Submission time Handle Problem Language Result Execution time Memory
628646 2022-08-13T14:48:02 Z Iwanttobreakfree Fancy Fence (CEOI20_fancyfence) C++17
0 / 100
 2 ms 340 KB 
#include <iostream>
#include <vector>
#include <map>
using namespace std;
const int mod=1e9+7;
int main(){
    int n;
    cin>>n;
    vector<int> v(n),h(n);
    map<int,int> mp;
    for(int& i:v)cin>>i;
    for(int& i:h)cin>>i;
    for(int i=0;i<n;i++){
        mp[h[i]]=(mp[h[i]]+v[i])%mod;
    }
    vector<pair<int,int>> comp;
    for(auto x:mp)comp.push_back(x);
    for(int i=comp.size()-1;i>0;i--)comp[i-1].second=(comp[i-1].second+comp[i].second)%mod;
    long long ans=0;
    for(int i=0;i<comp.size();i++){
        pair<int,int> x=comp[i];
        //cout<<(1ll*x.first*(x.first+1)/2)<<' '<<(1ll*x.second*(x.second+1)/2)<<'\n';
        ans+=(((1ll*x.first*(x.first+1)/2)%mod)*((1ll*x.second*(x.second+1)/2)%mod))%mod;
        ans%=mod;
        if(i){
            pair<int,int> y=comp[i-1];
            ans-=(((1ll*y.first*(y.first+1)/2)%mod)*((1ll*x.second*(x.second+1)/2)%mod))%mod;
            if(ans<0)ans=((ans%mod)+mod)%mod;
        }
    }
    cout<<ans;
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i=0;i<comp.size();i++){
      |                 ~^~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 2 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 2 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -