trading.cpp:1:32: warning: '-std=c++11' is not an option that controls warnings [-Wpragmas]
1 | #pragma GCC diagnostic warning "-std=c++11"
| ^~~~~~~~~~~~
trading.cpp: In function 'void test_case()':
trading.cpp:28:18: 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]
28 | for (int j=0; j<l[i].size(); j++) {
| ~^~~~~~~~~~~~
trading.cpp:38:18: 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]
38 | for (int j=0; j<r[i].size(); j++) {
| ~^~~~~~~~~~~~
trading.cpp:25:6: warning: unused variable 'ans' [-Wunused-variable]
25 | int ans=0;
| ^~~
trading.cpp: At global scope:
trading.cpp:44:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
44 | main () {
| ^~~~