Compilare: user.cpp: In function ‘void parc(int)’: user.cpp:22:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[n].v.size(); i++) ^ user.cpp: In function ‘void parct(int)’: user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[n].t.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:66:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < r.size(); i++) ^ user.cpp:68:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < r[i].size(); j++) ^ user.cpp:39:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.in", "r", stdin); ^ user.cpp:40:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.out", "w", stdout); ^ user.cpp:41:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:46:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^