View Compilation Error

0_0_37801755_5468.cpp: In function 'void solve()':
0_0_37801755_5468.cpp:74:43: error: missing template arguments before '(' token
             w[index].person.push_back(pair(ps[i].start, ps[i].start + ps[i].end));
                                           ^
0_0_37801755_5468.cpp:79:43: error: missing template arguments before '(' token
             w[index].person.push_back(pair(ps[i].start, w[index].person.back().second + ps[i].end));
                                           ^