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一直RE,帮忙看看是怎么回事#include<stdio.h>
int a[130][130];
int longsum(int tmp[],int n){
int maxn=0,sum=0;
for(int i=0;i<n;i++){
sum+=tmp[i];
if(sum>0){
if(sum>maxn)maxn=sum;
}
else sum=0;
}
return maxn;
}
int main(){
int n;
int tmp[130];
while(~scanf("%d",&n)){
int maxn=0;
int sig=0,x;
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
scanf("%d",&a[i][j]);
}
}
for(int i=n;i>0;i--){
for(int j=0;j<i;j++){
for(int m=0;m<n;m++){
tmp[m]=a[j][m];
}
x=j+1;
for(int k=0;k<sig;k++){
for(int m=0;m<n;m++){
tmp[m]+=a[x][m];
}
x++;
}
if(maxn<longsum(tmp,n)){
maxn=longsum(tmp,n);
}
sig++;
}
}
printf("%d\n",maxn);
}
return 0;
}
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