Compilare: main.cpp: In function 'int main()': 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%d",&n,&m,&q); ^ main.cpp:17:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&mat[i][j]); ^ main.cpp:29:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&x); ^ main.cpp:25:13: warning: iteration 1010024 invokes undefined behavior [-Waggressive-loop-optimizations] sol[i]=max(sol[i],sol[i-1]); ~~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:24:14: note: within this loop for(i=1;i<=N*N;i++){ ~^~~~~