Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:30:21: error: ‘c’ was not declared in this scope sum -= c*(v[j].second-v[j-1].second)-(v[j].first >= P ? P : 0); ^ user.cpp:30:24: error: ‘v’ was not declared in this scope sum -= c*(v[j].second-v[j-1].second)-(v[j].first >= P ? P : 0); ^ user.cpp:17:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carnati.in", "r", stdin); ^ user.cpp:18:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carnati.out", "w", stdout); ^ user.cpp:21:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&C); ^ user.cpp:23:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&p[i].first, &p[i].second); ^