Compilare: main.cpp: In function 'int main()': main.cpp:35:26: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if((i1>>j1)&1!=0) { ~^~~ main.cpp:56:30: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if((i2>>j2)&1!=0) { ~^~~ main.cpp:10:73: warning: unused variable 'sum3' [-Wunused-variable] int i, mod, s1, s2, x, y, n, m, j, i1, j1, i2, j2, sum, sum1, sum2, sum3, max, nrl, nrc, summ1, summ2, summ3, summ4; ^~~~ main.cpp:14:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d", &n, &m); ^ main.cpp:18:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a[i][j]); ^