dango3.cpp: In function 'void solve(int, int)':
dango3.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for(int i=0;i<v.size();i++){
| ~^~~~~~~~~
dango3.cpp:24:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | for(int j=0;j<v.size();j++){
| ~^~~~~~~~~
dango3.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for(int i=0;i<v.size();i++){
| ~^~~~~~~~~
/usr/bin/ld: /tmp/ccxcDZ1B.o: in function `main':
grader.cpp:(.text.startup+0x111): undefined reference to `Solve(int, int)'
collect2: error: ld returned 1 exit status