Compilare: user.cpp: In function ‘int main()’: user.cpp:210:70: warning: unused variable ‘z’ [-Wunused-variable] int x = edges[j].first.first, y = edges[j].first.second, z = edges[j].second; ^ user.cpp:182:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nespus.in", "r", stdin); ^ user.cpp:183:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nespus.out", "w", stdout); ^ user.cpp:188:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &K); ^ user.cpp:192:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &z); ^