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Cod sursa(job #771267)
#include<stdio.h>
FILE *f = fopen("cuburi2.in","r");
FILE *g = fopen("cuburi2.out","w");
#define MaxN 250100
#define INF 1LL<<58;
#define ll long long
#define formula (ll)(Best_S[i]-(i-x+1)*B_S[x]-Best_S[x-1]+Best_D[i]-(y-i+1)*B_D[y]-Best_D[y+1])
int N,M,Poz;
ll Sol;
int A[MaxN];
ll B_S[MaxN],B_D[MaxN],Best_S[MaxN],Best_D[MaxN];
void citire(void)
{
fscanf(f,"%d %d",&N,&M);
for(int i=1;i<=N;i++)
fscanf(f,"%d ",&A[i]);
}
void Afisare(int A[])
{
for(int i=1;i<=N;i++)
printf("%d ",A[i]);
printf("\n");
}
void Preprocesare(void)
{
for(int i=1;i<=N;i++)
B_S[i] = B_S[i-1]+A[i-1];
for(int i=1;i<=N;i++)
Best_S[i] = Best_S[i-1]+B_S[i];
for(int i=N;i;i--)
B_D[i] = B_D[i+1]+A[i+1];
for(int i=N;i;i--)
Best_D[i] = Best_D[i+1]+B_D[i];
}
inline ll min(ll a,ll b)
{
return a < b ? a : b;
}
inline void Minim(int x,int y)
{
Sol = INF;
for(int i=x;i<=y;i++)
{
if(Sol > formula)
Sol = formula, Poz = i;
}
}
void Rezolvare(void)
{
int a,b;
Preprocesare();
for(int i=1;i<=M;i++)
{
fscanf(f,"%d %d",&a,&b);
Minim(a,b);
fprintf(g,"%d %lld\n",Poz,Sol);
}
}
int main()
{
citire();
Rezolvare();
}