XCorr.cpp: In function 'int main()':
XCorr.cpp:26:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(LL i=0;i<X.size();i++){
~^~~~~~~~~
XCorr.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(;j<Y.size()&&Y[j].index+a<=X[i].index;j++){
~^~~~~~~~~
XCorr.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld",&a);
~~~~~^~~~~~~~~~~
XCorr.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld",&imsi.index,&imsi.item);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
XCorr.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld",&a);
~~~~~^~~~~~~~~~~
XCorr.cpp:20:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld",&imsi.index,&imsi.item);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
XCorr.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld",&a,&b);
~~~~~^~~~~~~~~~~~~~~~~~~