Cod sursa(job #1432193)

Utilizator StarGold2Emanuel Nrx StarGold2 Data 9 mai 2015 11:53:51
Problema Cuburi2 Scor 36
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.29 kb
#include <cstdio>
#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];

void SetUp(){
    fscanf(fin, "%d %d", &N, &Q);
    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, long long 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 st = X, dr = Y;
    while(st <= dr){
        int mid = (st + dr) / 2;
        long long val1 = 0, val2 = 0, val3 = 0;
        val1 = Dist(A, B, X, mid-1, Y);
        val2 = Dist(A, B, X, mid  , Y);
        val3 = Dist(A, B, X, mid+1, Y);
        if(val2 <= val1 && val2 <= val3){
            fprintf(fout, "%d %d\n", mid, val2);
            return;
        } else {
            if(val1 < val2) dr = mid - 1;
            if(val3 < val2) st = mid + 1;
        }
    }
    return;
}

int main(){
    SetUp();
    while(Q){
        fscanf(fin, "%d %d", &X, &Y);
        Query(X, Y); Q --;
    }
    return 0;
}