Submission #203985

#	Time	Username	Problem	Language	Result	Execution time	Memory
203985		awlintqaa	Sails (IOI07_sails)	C++14	0 / 100	100 ms	3832 KiB

sails

#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
using namespace std;
#define sqr 200
#define mid (l+r)/2
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define ins insert
#define era erase
#define C continue
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define mset multiset
typedef long long ll;
typedef short int si;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pi> vpi;
typedef vector<pll> vpll;
const ll mod=1e9+7;
const ll inf= 4e18;
const ld pai=acos(-1);
ll n , MX = 1e5;
pll a [100009];
ll sum[100009];
void upd ( ll l, ll r ){
        sum [l] ++ ;
        sum [r+1] -- ;
}
ll calc( ll x ){
        if ( x ==0 ) return 0 ;
        return x * (x-1ll) /2ll ;
}
int main () {
        cin >> n ;
        for ( int i =0 ;i < n;i ++ ) {
                cin >> a[i].fi >> a[i].se;
        }
        sort ( a, a +n ) ;
        ll last = 0 ;
        for ( ll i =0 ;i < n; i ++ ) {
                ll k = a[i].se ;
                ll h = a[i].fi ;
                ll l = last +1 ;
                ll r = min ( l + k - 1 , h ) ;
                if ( l <= r ) {
                        upd ( l, r ) ;
                }
                ll X = k - (r-l+1) ;
                if ( X > 0 ) {
                        l = 1 ;
                        r = l + X -1 ;
                        if ( l <= r ){
                                upd ( l,r );
                        }
                }
                last = r ;
        }
        for ( ll i =1 ;i <= MX ;i ++ ) {
                sum [i] += sum[i-1];
        }
        ll ans =0 ;
        for ( ll i =0 ;i <= MX ;i ++ ) {
                ans += calc ( sum [i] ) ;
        }
        cout << ans << endl;
}

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