Compilare: main.cpp: In function 'int main()': main.cpp:51:15: warning: unused variable 'nr' [-Wunused-variable] int m, n, nr = 0, x, y, s; ^~ main.cpp:52:38: 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, &s); ^ main.cpp:54:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^