Submission #78699

#	Time	Username	Problem	Language	Result	Execution time	Memory
78699		Vardanyan	Sails (IOI07_sails)	C++14	30 / 100	1078 ms	6032 KiB

sails

#include <bits/stdc++.h>
using namespace std;
const int N = 100*1000+7;
pair<int,int> a[N];
int d[N];
int main(){
    int n;
    scanf("%d",&n);
    for(int i = 1;i<=n;i++){
        scanf("%d%d",&a[i].first,&a[i].second);
    }
    sort(a+1,a+1+n);
    for(int i = 1;i<=n;i++){
        vector<pair<int,int> > ind;
        for(int j = 1;j<=a[i].first;j++) ind.push_back({d[j],j});
        sort(ind.begin(),ind.end());
        for(int j = 0;j<a[i].second;j++) d[ind[j].second]++;
    }
    long long ans = 0;
    for(int i = 1;i<=N-2;i++){
        long long c = d[i];
        c*=(c-1);
        c/=2;
        ans+=c;
    }
    cout<<ans<<endl;
    return 0;
}

Compilation message (stderr)

sails.cpp: In function 'int main()':
sails.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
sails.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&a[i].first,&a[i].second);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10