Compilare: main.cpp: In function 'int main()': main.cpp:61:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] elim[i]=niv[i]=0; ~~~~~~^~ main.cpp:67:23: warning: suggest parentheses around assignment used as truth value [-Wparentheses] elim[N]=niv[N]=0; ~~~~~~^~ 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("ct.in", "r", stdin); ^ main.cpp:53:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ct.out", "w", stdout); ^ main.cpp:54:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ main.cpp:58:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ main.cpp:63:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &A, &B); ^ main.cpp:92:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &nod1, &nod2); ^