Submission #597210

#	Time	Username	Problem	Language	Result	Execution time	Memory
597210		Deepesson	Sum Zero (RMI20_sumzero)	C++17	61 / 100	293 ms	21932 KiB

sumzero

#include <bits/stdc++.h>
#define MAX 405000
#define LOG 19
using ll = long long;

int N;
int jump[MAX][2];
int pulo_origem[MAX];

void simular_camada(int u){
    for(int i=0;i!=N;++i)jump[i][0]=pulo_origem[i];

    for(int j=1;j!=u+1;++j){
        int cord = j&1;
        int oposto = !cord;
        for(int i=0;i!=N;++i){
            int x = jump[i][oposto];
            if(x<0)jump[i][cord]=x-1;
            else jump[i][cord]=jump[x][oposto];
        }
    }
}

int main()
{
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
    std::cout.tie(0);

    std::cin>>N;

    std::map<ll,int> mapa;

    mapa[0]=-1;
    int prev=-7;
    ll s=0;
    for(int i=0;i!=N;++i){
        ll x;
        std::cin>>x;
        s+=x;
        ll falta = s;
        if(mapa.find(falta)!=mapa.end()){
            prev=std::max(prev,mapa[falta]);
        }
        pulo_origem[i]=prev;
        mapa[s]=i;
    }
    mapa.clear();

    int Q;
    std::cin>>Q;
    int ans[Q]={},pos[Q],lim[Q];
    for(int i=0;i!=Q;++i){
        int l,r;
        std::cin>>l>>r;l-=2;--r;
        pos[i] = r;
        lim[i] = l;
    }

    ///Exponenciacao binaria
    for(int j=LOG-1;j!=-1;--j){
        simular_camada(j);
        for(int i=0;i!=Q;++i){
            if(pos[i]>=0&&jump[pos[i]][j&1]>=lim[i]){
                ans[i]+=1<<j;
                pos[i]=jump[pos[i]][j&1];
            }
        }
    }

    for(int i=0;i!=Q;++i)std::cout<<ans[i]<<"\n";
}

• Subtask 1: 22 / 22
• Subtask 2: 39 / 39
• Subtask 3: 0 / 39