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Cod sursa(job #151774)
#include<fstream.h>
#define nmax 350
ifstream f("teren.in");
ofstream g("teren.out");
int a[nmax][nmax], secv[nmax], n, m, i, j, k, sum, ik, mk, maxx, ok;
int main()
{
f>>n>>m>>ok;
for(i=1; i<=n; i++)
for(j=1; j<=m; j++) f>>a[i][j];
for(i=1; i<=n; i++)
for(j=1; j<=m; j++) a[i][j] = a[i-1][j] + a[i][j];
for(i=0; i<n; i++)
for(j=i+1; j<=n; j++){
for(k=1; k<=m; k++) secv[k] = a[j][k] - a[i][k];
sum=0;
mk=0;
ik=1;
for(k=1;k<=m;k++){
sum=sum+secv[k];
while( sum > ok )
sum = sum - secv[ik++];
if( k - ik + 1 > mk ) mk = k - ik + 1;
}
if( maxx < (j-i+1) *mk ) maxx = (j-i+1) * mk;
}
g<<maxx;
g.close();
return 0;
}