Compilare: user.cpp: In function ‘void solve()’: user.cpp:78:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < infas.size()-1; i++) { ^ user.cpp:85:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < infas.size()-1; j++) { ^ user.cpp: In function ‘void citire()’: user.cpp:33:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:35:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf", &a[i].x, &a[i].y); ^ user.cpp: In function ‘int main()’: user.cpp:102:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in", "r", stdin); ^ user.cpp:103:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out", "w", stdout); ^