Compilare: user.cpp: In function ‘int main()’: user.cpp:23:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < solutions.size(); j++){ ^ user.cpp:32:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(solutions[j].size() >= vecMax){ ^ user.cpp:41:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(tm.size() >= vecMax){ ^ user.cpp:48:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < solutions.size() - 1; j++) ^ user.cpp:57:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(tm.size() >= vecMax){ ^ user.cpp:61:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < solutions.size() - 1; j++) ^ user.cpp:69:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < solutions[indexVec].size(); i++) ^ user.cpp:8:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.in", "r", stdin); ^ user.cpp:9:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.out","w", stdout); ^ user.cpp:11:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld ", &n); ^ user.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld ", &x); ^ user.cpp:19:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld ", &x); ^