codeforces 948C

Producing Snow

树状数组模拟即可

#include "iostream"
#include "iomanip"
#include "string.h"
#include "stack"
#include "queue"
#include "string"
#include "vector"
#include "set"
#include "map"
#include "algorithm"
#include "stdio.h"
#include "math.h"
#pragma comment(linker, "/STACK:102400000,102400000")
#define bug(x) cout<<x<<" "<<"UUUUU"<<endl;
#define mem(a,x) memset(a,x,sizeof(a))
#define step(x) fixed<< setprecision(x)<<
#define mp(x,y) make_pair(x,y)
#define pb(x) push_back(x)
#define ll long long
#define endl ("\n")
#define ft first
#define sd second
#define lrt (rt<<1)
#define rrt (rt<<1|1)
using namespace std;
const ll mod=1e9+7;
const ll INF = 1e18+1LL;
const int inf = 1e9+1e8;
const double PI=acos(-1.0);
const int N=1e5+100;

ll n, v[N], t[N], C[N], sum[N], sp[N];

ll Sum(ll x){
    ll ret = 0;
    for(int i=x; i>0; i-=i&(-i)){
        ret += C[i];
    }
    return ret;
}
void add(ll x, ll num){
    for(int i=x; i<=n; i+=i&(-i)){
        C[i] += num;
    }
}

int main(){
    scanf("%lld", &n);
    for(int i=1; i<=n; ++i){
        scanf("%lld", &v[i]);
    }
    for(int i=1; i<=n; ++i){
        scanf("%lld", &t[i]);
        sum[i] = sum[i-1] + t[i]; //cout<<sum[i]<<" ";
    }
    t[n+1] = inf, sum[n+1] = sum[n] + t[n+1];
    for(int i=1; i<=n; ++i){
        ll goal = v[i] + sum[i-1]; //cout<<goal<<endl;
        ll l=1, r=n, ans = 0;
        while(l <= r){
            ll mid = l+r>>1;
            if(sum[mid] <= goal){
                ans = mid;
                l = mid+1;
            }
            else r = mid-1;
        }
        add(i, 1), add(ans+1, -1);
        sp[ans+1] += goal - sum[ans];
    }
    for(int i=1; i<=n; ++i){
        ll ret = Sum(i)*t[i] + sp[i];
        cout<<ret<<" ";
    }
    return 0;
}