Compilare: user.cpp: In function ‘void prepare()’: user.cpp:87:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < capac.size()-1; i++) ^ user.cpp:99:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < coaja.size()-1; i++) ^ user.cpp: In function ‘void read()’: user.cpp:41:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:43:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &a[i].x, &a[i].y1, &a[i].y2); ^ user.cpp: In function ‘int main()’: user.cpp:133:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("oypara.in", "r", stdin); ^ user.cpp:134:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("oypara.out", "w", stdout); ^