#include <cstdio> #include <vector> #include <set> #include <algorithm> using namespace std; typedef pair<int,int> pi; typedef multiset<pi> ::iterator aauto; int n, m, o; multiset<pi> s; int c[500005], p[500005]; vector<pi> v, q; vector<int> match; int main(){ scanf("%d %d %d",&n,&m,&o); for(int i=0; i<n; i++){ scanf("%d %d",&c[i],&p[i]); s.insert(pi(p[i], c[i])); } for(int i=0; i<m; i++){ int val, d; scanf("%d %d",&val, &d); q.push_back(pi(val, -d)); } sort(q.begin(), q.end()); reverse(q.begin(), q.end()); for(int i=0; i<q.size(); i++){ aauto t = s.lower_bound(pi(-q[i].second, -1e9)); if(t == s.end()) continue; int diff = q[i].first - t->second; if(diff < 0) continue; s.erase(t); match.push_back(diff); } sort(match.begin(), match.end()); reverse(match.begin(), match.end()); long long ret = 0; for(int i=0; i<o && i < match.size(); i++){ ret += max(match[i], 0); } printf("%lld\n",ret); }

hot.cpp: In function 'int main()':
hot.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<q.size(); i++){
                  ~^~~~~~~~~
hot.cpp:41:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<o && i < match.size(); i++){
                         ~~^~~~~~~~~~~~~~
hot.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d",&n,&m,&o);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~
hot.cpp:20:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&c[i],&p[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~
hot.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&val, &d);
         ~~~~~^~~~~~~~~~~~~~~~~~