teams.cpp: In function 'int can(int, std::vector<int>)':
teams.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | while(ptr + 1 < vr.size() && vr[ptr + 1].fi <= j) pq.push(vr[ptr + 1].se), ptr++;
| ~~~~~~~~^~~~~~~~~~~
teams.cpp:34:10: warning: unused variable 'ff' [-Wunused-variable]
34 | bool ff = true;
| ^~
teams.cpp:31:13: warning: unused parameter 'm' [-Wunused-parameter]
31 | int can(int m,vector<int> K){
| ~~~~^
teams.cpp: In function 'int main()':
teams.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
59 | freopen(task ".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
teams.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
60 | freopen(task ".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccjgZ0q7.o: in function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'; /tmp/cczlcyM8.o:teams.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccjgZ0q7.o: in function `main':
grader.c:(.text.startup+0x88): undefined reference to `init(int, int*, int*)'
/usr/bin/ld: grader.c:(.text.startup+0x242): undefined reference to `can(int, int*)'
collect2: error: ld returned 1 exit status