Compilare: main.cpp: In function 'int main()': main.cpp:95:9: warning: unused variable 't' [-Wunused-variable] int t=0; ^ main.cpp:96:9: warning: unused variable 'ok' [-Wunused-variable] int ok=0; ^~ main.cpp:51:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in", "r", stdin); ^ main.cpp:52:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out", "w", stdout); ^ main.cpp:54:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &N, &M); ^ main.cpp:59:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&a,&b,&c); ^