stones.cpp:22:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
22 | main(){
| ^
stones.cpp: In function 'int main()':
stones.cpp:33:23: 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]
33 | for (i=0;i<v[1].size();++i){
| ~^~~~~~~~~~~~
stones.cpp:34:27: 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]
34 | for (j=0;j<v[2].size();++j){
| ~^~~~~~~~~~~~
stones.cpp:11:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
11 | #define scan1(a) scanf("%lld",&a);
| ~~~~~^~~~~~~~~~~
stones.cpp:24:5: note: in expansion of macro 'scan1'
24 | scan1(n)
| ^~~~~
stones.cpp:12:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
12 | #define scan2(a,b) scanf("%lld %lld",&a, &b);
| ~~~~~^~~~~~~~~~~~~~~~~~~~
stones.cpp:27:9: note: in expansion of macro 'scan2'
27 | scan2(c,a)
| ^~~~~