dango3.cpp: In function 'void Solve(int, int)':
dango3.cpp:31:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
31 | for(int i=0;i<v.size();i++){
| ~^~~~~~~~~
dango3.cpp:34:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
34 | for(int j=0;j<v.size();j++){
| ~^~~~~~~~~
dango3.cpp:40:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
40 | for(int i=0;i<v.size();i++){
| ~^~~~~~~~~
/usr/bin/ld: /tmp/ccfx4xp9.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccwSgwh7.o:dango3.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status