Compilare: main.cpp: In function 'int logic(std::vector<int>&, std::vector<int>&)': main.cpp:13:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (act2 < b.size() && a[0] > b[act2]) ~~~~~^~~~~~~~~~ main.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<a.size()-1;++i) ~^~~~~~~~~~~ main.cpp:18:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (act2 < b.size() && b[act2] >= a[i] && b[act2] <= a[i+1]) ~~~~~^~~~~~~~~~ main.cpp:21:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (act2 < b.size() && b[act2] >= a[i] && b[act2] <= a[i+1]) ~~~~~^~~~~~~~~~ main.cpp:25:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (act2 != b.size() && act2 > 1 && b[act2-1] != a.back()) ~~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:13: warning: unused variable 'act1' [-Wunused-variable] int act1 = 1, act2 = 1; ^~~~ main.cpp:62:23: warning: unused variable 'act2' [-Wunused-variable] int act1 = 1, act2 = 1; ^~~~ main.cpp:31:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("portofel.in","r",stdin); ^ main.cpp:32:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("portofel.out","w",stdout); ^ main.cpp:33:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ main.cpp:36:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ main.cpp:41:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:50:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^