Cod sursa(job #1432579)

Utilizator StarGold2Emanuel Nrx StarGold2 Data 9 mai 2015 12:41:33
Problema Cuburi2 Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.29 kb
#include <cstdio>
#include <ctype.h>
#define INF ((1LL<<63)-1)
#define DIM 256000
using namespace std;

FILE *fin = fopen("cuburi2.in" ,"r");
FILE *fout= fopen("cuburi2.out","w");

int N, V[DIM], Q, X, Y; long long A[DIM], B[DIM];

inline int read(){
    int x = 0;
    char ch = fgetc(fin);
    while(!isdigit(ch)){
        ch = fgetc(fin);
    }
    while(isdigit(ch)){
        x = 10 * x + (ch - '0');
        ch = fgetc(fin);
    }
    return x;
}

void SetUp(){
    N = read(); Q = read();
    for(int i = 1; i <= N; i ++){
        fscanf(fin, "%d", &V[i]);
        A[i] = A[i-1] + V[i];
        B[i] = B[i-1] + V[i] * 1LL * i;
    }
    return;
}

inline long long Dist(long long A[], long long B[], int st, int mid, int dr){
    return ((A[mid] - A[st-1]) * 1LL * mid - (B[mid] - B[st-1])) + ((B[dr] - B[mid-1]) - (A[dr] - A[mid-1]) * 1LL * mid);
}

void Query(int X, int Y){
    int P = X, pas;
    for(pas = 1<<17; pas != 0; pas >>= 1){
        if((P + pas <= Y) && ((A[P+pas-1]<<1) < A[Y] + A[X-1]))
            P += pas;
    }
    fprintf(fout, "%d %lld\n", P, Dist(A, B, X, P, Y));
    return;
}

int main(){
    SetUp();
    while(Q){
        X = read(); Y = read();
        Query(X, Y); Q --;
    }
    fclose(fin );
    fclose(fout);
    return 0;
}