Compilare: user.cpp: In function ‘int buildPoly(coord, coord, int)’: user.cpp:75:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < poly.size(); i++) ^ user.cpp:79:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s2.size()-1; i++) ^ user.cpp:83:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < poly.size(); i++) ^ user.cpp: In function ‘double arie()’: user.cpp:94:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < poly.size()-1; i++) ^ user.cpp: In function ‘void solve()’: user.cpp:124:45: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (dif < best || eq(dif, best) && better()) { ^ user.cpp: In function ‘void read()’: user.cpp:40:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:42:43: 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 better()’: user.cpp:108:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:136:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gradina.in", "r", stdin); ^ user.cpp:137:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gradina.out", "w", stdout); ^