Compilare: user.cpp: In function ‘void Solve_2()’: user.cpp:48:13: warning: unused variable ‘v’ [-Wunused-variable] int i,j,v,minn,p,l=0; ^ user.cpp: In function ‘int main()’: user.cpp:76:57: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘char*’ [-Wformat=] for(j = 1; j <= M; ++j) fscanf(fin,"%d",&a[i][j]); ^ user.cpp:74:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&N,&M); ^ user.cpp:76:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j = 1; j <= M; ++j) fscanf(fin,"%d",&a[i][j]); ^