Submission #1083937

#	Time	Username	Problem	Language	Result	Execution time	Memory
1083937		steveonalex	Sails (IOI07_sails)	C++17	55 / 100	15 ms	3056 KiB

sails

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }


int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
    clock_t start = clock();

    const int N = 1e5 + 69;

    int n; cin >> n;
    vector<pair<int, int>> a(n);
    for(int i = 0; i<n; ++i) cin >> a[i].first >> a[i].second;

    vector<int> pref(N);
    ll sum = 0;
    for(pair<int, int> i: a){
        sum += i.first - i.second;
        pref[i.first]++;
    }

    for(int i = N - 1; i >= 1; --i){
        pref[i-1] += pref[i];
    }

    vector<int> cnt(n+1);
    for(int i = 1; i<N; ++i) if (pref[i]) cnt[pref[i]]++;

    for(int i = n; i >= 1; --i){
        if (cnt[i] <= sum){
            sum -= cnt[i];
            cnt[i-1] += cnt[i];
            cnt[i] = 0;
        }
        else{
            cnt[i] -= sum;
            cnt[i-1] += sum;
            sum = 0;
            break;
        }
    }

    ll ans = 0;
    for(int i = 1; i <= n; ++i){
        ll cur = 1LL * i * (i - 1) / 2;
        ans += cur * cnt[i];
    }

    cout << ans << "\n";

    cerr << "Time elapsed: " << clock() - start << " ms\n";
    return 0;
}

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