Compilare: main.cpp: In function 'std::vector<int> merge(const std::vector<int>&, const std::vector<int>&)': main.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) { ~~^~~~~~~~~~ main.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) { ~~^~~~~~~~~~ main.cpp:25:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size()) ~~^~~~~~~~~~ main.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < b.size()) ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> inter(const std::vector<int>&, const std::vector<int>&)': main.cpp:35:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) { ~~^~~~~~~~~~ main.cpp:35:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) { ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> expresie()': main.cpp:57:25: warning: array subscript has type 'char' [-Wchar-subscripts] b = vars[cur]; ^ main.cpp:70:29: warning: array subscript has type 'char' [-Wchar-subscripts] c = vars[cur]; ^ main.cpp: In function 'int main()': main.cpp:92:20: warning: array subscript has type 'char' [-Wchar-subscripts] vars[ch].push_back(a); ^ main.cpp:98:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n", rez.size()); ^ main.cpp:81:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("multimi4.in", "r", stdin); ^ main.cpp:82:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("multimi4.out", "w", stdout); ^ main.cpp:85:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^ main.cpp:89:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c=%d-%d/%d ", &ch, &a, &b, &c); ^