Compilare: main.cpp: In function 'void solve()': main.cpp:39:28: 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:42:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin," %c",&mat[i][j]); ^ main.cpp: In function 'int main()': main.cpp:77:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&t); ^