fangorn.cpp: In function 'int main(int, const char**)':
fangorn.cpp:69:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j = 0; j < v.size(); j++) {
~~^~~~~~~~~~
fangorn.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &w, &h);
~~~~~^~~~~~~~~~~~~~~~~
fangorn.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &s.x, &s.y);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
fangorn.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &C);
~~~~~^~~~~~~~~~
fangorn.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &c[i].x, &c[i].y);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fangorn.cpp:46:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &N);
~~~~~^~~~~~~~~~
fangorn.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &t[i].x, &t[i].y);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~