Compilare: user.cpp: In function ‘int main()’: user.cpp:117:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < comp[c].size(); i++) ^ user.cpp:119:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < comp[c].size(); i++) ^ user.cpp:60:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("network.in", "r", stdin); ^ user.cpp:61:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("network.out", "w", stdout); ^ user.cpp:65:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:70:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf%lf", &x, &y, &p0, &p1); ^