Compilare: user.cpp: In function ‘void solve(int, int, int, int)’: user.cpp:61:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(temp1.size() >= k1 + 1 && temp1[k1] < minim) { ^ user.cpp:65:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(temp2.size() >= k1 + 1 && temp2[k1] < minim) { ^ user.cpp: In function ‘int main()’: user.cpp:71:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("geom.in", "r", stdin); ^ user.cpp:72:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("geom.out", "w", stdout); ^ user.cpp:76:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k1); ^ user.cpp:81:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^