Submission #624719

#	Time	Username	Problem	Language	Result	Execution time	Memory
624719		moyindavid	Meetings (IOI18_meetings)	C++17	4 / 100	808 ms	786432 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>

using namespace std;

vector<long long> minimum_costs(vector<int> H, vector<int> L,vector<int> R) {
    int n=H.size(),cost[n][n];
    for(int i=0;i<n;i++){
        cost[i][i]=H[i];
        for(int j=i+1;j<n;j++)cost[i][j]=max(cost[i][j-1],H[j]);
    }
    for(int i=n-1;i>=0;i--){
        for(int j=i-1;j>=0;j--)cost[i][j]=max(cost[i][j+1],H[j]);
    }

    int Q = L.size();
    vector<long long> C(Q,3000000000007);
    long long left[n][n],right[n][n],temp=0;
    for(int i=0;i<n;i++)for(int j=0;j<n;j++){left[i][j]=0;right[i][j]=0;}


    for(int i=0;i<n;i++){
        left[i][i]=cost[i][i];
        for(int k=i-1;k>=0;k--){
            left[k][i]=cost[k][i]+left[k+1][i];
        }
        right[i][i]=cost[i][i];
        for(int k=i+1;k<n;k++){
            right[k][i]=cost[k][i]+right[k-1][i];
        }
    }

    for (int j = 0; j < Q; ++j) {
        for(int i=L[j];i<=R[j];i++){
            if(i==L[j])C[j]=min(C[j],right[R[j]][i]);
            else if(i==R[j])C[j]=min(C[j],left[L[j]][i]);
            else C[j]=min(C[j],-cost[i][i]+right[R[j]][i]+left[L[j]][i]);
        }
    }
    return C;
}

Compilation message (stderr)

meetings.cpp: In function 'std::vector<long long int> minimum_costs(std::vector<int>, std::vector<int>, std::vector<int>)':
meetings.cpp:18:38: warning: unused variable 'temp' [-Wunused-variable]
   18 |     long long left[n][n],right[n][n],temp=0;
      |                                      ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40