Submission #885408

#	Time	Username	Problem	Language	Result	Execution time	Memory
885408		AlphaMale06	Sails (IOI07_sails)	C++14	25 / 100	1054 ms	6884 KiB

sails

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define pb push_back
#define F first
#define S second

const int N = 100001;
int cnt[N];

signed main()
{
    int n;
    cin >> n;
    vector<pair<int, int>> vc;
    for(int i=0; i< n; i++){
        int x, y;
        cin >> x >> y;
        if(x==y)cnt[x]++;
        else{
            vc.pb({x, y});
        }
    }
    for(int i=N-2; i>0; i--){
        cnt[i]+=cnt[i+1];
    }
    sort(vc.begin(), vc.end());
    for(pair<int, int> p : vc){
        int f=p.F; int s=p.S;
        vector<pair<int, int>> upd;
        for(int i=1; i<=p.F; i++){
            upd.pb({cnt[i], i});
        }
        sort(upd.begin(), upd.end());
        for(int i=0; i<p.S; i++){
            cnt[upd[i].S]++;
        }
    }
    int ans=0;
    for(int i=1; i<10; i++){
        ans+=cnt[i]*(cnt[i]-1);
    }
    cout << ans/2 << '\n';
}

Compilation message (stderr)

sails.cpp: In function 'int main()':
sails.cpp:31:13: warning: unused variable 'f' [-Wunused-variable]
   31 |         int f=p.F; int s=p.S;
      |             ^
sails.cpp:31:24: warning: unused variable 's' [-Wunused-variable]
   31 |         int f=p.F; int s=p.S;
      |                        ^

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 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