Compilare: user.cpp: In function ‘int main()’: user.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v1[i].size(); ++j) { ^ user.cpp:65:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz + 1 < v2[i].size() && v2[i][poz + 1].val - v1[i][j].val < minim) { ^ user.cpp:39:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi3.in", "r", stdin); ^ user.cpp:40:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi3.out", "w", stdout); ^ user.cpp:41:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lf", &n, &d); ^ user.cpp:45:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%d", &dist, &c); ^ user.cpp:51:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%d", &dist, &c); ^