Borderou de evaluare (job #812233)

Compilare: main.cpp: In function 'int main()': main.cpp:52:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 52 | while(j<=st.size()-2 && u) | ~^~~~~~~~~~~~~ main.cpp:65:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 65 | while(j<=st.size()-2 && u) | ~^~~~~~~~~~~~~ main.cpp:75:13: warning: statement has no effect [-Wunused-value] 75 | for(k; k<=j; k++) | ^ main.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result] 24 | { freopen("clasa2.in", "r", stdin); | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~