Compilare: main.cpp: In function 'int main()': main.cpp:112:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 112 | for(it=0;it<ox.size();it++) | ~~^~~~~~~~~~ main.cpp:116:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 116 | for(it=0;it<oy.size();it++) | ~~^~~~~~~~~~ main.cpp:124:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for(j=1;j<oy.size();j++) | ~^~~~~~~~~~ main.cpp:128:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | for(i=1;i<ox.size();i++) | ~^~~~~~~~~~ main.cpp:131:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 131 | for(j=0;j<oy.size();j++) | ~^~~~~~~~~~ main.cpp:137:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 137 | for(i=0;i<ox.size();i++) | ~^~~~~~~~~~ main.cpp:139:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 139 | for(j=0;j<oy.size();j++) | ~^~~~~~~~~~ main.cpp:159:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 159 | if(w.x==ox.size()-1) | ~~~^~~~~~~~~~~~~ main.cpp:167:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 167 | if(w.y==oy.size()-1) | ~~~^~~~~~~~~~~~~