/in/foo.cc: In function 'int main()':
/in/foo.cc:35:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<v.size()-1;i++) {
~^~~~~~~~~~~
/in/foo.cc:43:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;v2.size()<len;j++) {
~~~~~~~~~^~~~
/in/foo.cc:49:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=v.size()-1;v1.size()<len;j--) {
~~~~~~~~~^~~~
/in/foo.cc:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;v2.size()<len+1;j++) {
~~~~~~~~~^~~~~~
/in/foo.cc:69:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=v.size()-1;v1.size()<len;j--) {
~~~~~~~~~^~~~