Compilare: main.cpp: In function 'bool cmp(std::pair<std::pair<long long int, long long int>, long long int>, std::pair<std::pair<long long int, long long int>, long long int>)': main.cpp:17:42: warning: suggest parentheses around '&&' within '||' [-Wparentheses] a.first.second == b.first.second && a.first.first<b.first.first || ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:18:74: warning: suggest parentheses around '&&' within '||' [-Wparentheses] a.first.second == b.first.second && a.first.first==b.first.first && a.second<b.second; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:34:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("troll.in","r",stdin); ^ main.cpp:35:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("troll.out","w",stdout); ^ main.cpp:37:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:40:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld", &x,&y,&z); ^