/in/foo.cc: In function 'int main()':
/in/foo.cc:24:25: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'll* {aka long long int*}' [-Wformat=]
    scanf("%d",&sum[i][j]);
                         ^
/in/foo.cc:41:19: warning: 'o' may be used uninitialized in this function [-Wmaybe-uninitialized]
    o+=(k+sum[i][t]);
                   ^